diff --git a/third_party/WebKit/LayoutTests/animations/interpolation/backdrop-filter-interpolation-expected.txt b/third_party/WebKit/LayoutTests/animations/interpolation/backdrop-filter-interpolation-expected.txt
index ee0621af72640..c9fd2c568f6cc 100644
--- a/third_party/WebKit/LayoutTests/animations/interpolation/backdrop-filter-interpolation-expected.txt
+++ b/third_party/WebKit/LayoutTests/animations/interpolation/backdrop-filter-interpolation-expected.txt
@@ -179,13 +179,13 @@ PASS CSS Animations: property <backdrop-filter> from [grayscale(0) blur(0px)] to
 PASS CSS Animations: property <backdrop-filter> from [grayscale(0) blur(0px)] to [blur(10px)] at (1) is [blur(10px)] 
 PASS CSS Animations: property <backdrop-filter> from [grayscale(0) blur(0px)] to [blur(10px)] at (1.5) is [blur(10px)] 
 PASS CSS Animations: property <backdrop-filter> from [blur(6px)] to [blur(10px) hue-rotate(180deg)] at (-0.5) is [blur(4px) hue-rotate(-90deg)] 
-PASS CSS Animations: property <backdrop-filter> from [blur(6px)] to [blur(10px) hue-rotate(180deg)] at (0) is [blur(6px) hue-rotate(0deg)] 
+FAIL CSS Animations: property <backdrop-filter> from [blur(6px)] to [blur(10px) hue-rotate(180deg)] at (0) is [blur(6px)] assert_equals: expected "blur ( 6px ) hue - rotate ( 0deg ) " but got "blur ( 6px ) "
 PASS CSS Animations: property <backdrop-filter> from [blur(6px)] to [blur(10px) hue-rotate(180deg)] at (0.25) is [blur(7px) hue-rotate(45deg)] 
 PASS CSS Animations: property <backdrop-filter> from [blur(6px)] to [blur(10px) hue-rotate(180deg)] at (0.5) is [blur(8px) hue-rotate(90deg)] 
 PASS CSS Animations: property <backdrop-filter> from [blur(6px)] to [blur(10px) hue-rotate(180deg)] at (1) is [blur(10px) hue-rotate(180deg)] 
 PASS CSS Animations: property <backdrop-filter> from [blur(6px)] to [blur(10px) hue-rotate(180deg)] at (1.5) is [blur(12px) hue-rotate(270deg)] 
 PASS CSS Animations: property <backdrop-filter> from [none] to [hue-rotate(180deg)] at (-0.5) is [hue-rotate(-90deg)] 
-PASS CSS Animations: property <backdrop-filter> from [none] to [hue-rotate(180deg)] at (0) is [hue-rotate(0deg)] 
+FAIL CSS Animations: property <backdrop-filter> from [none] to [hue-rotate(180deg)] at (0) is [none] assert_equals: expected "hue - rotate ( 0deg ) " but got "none "
 PASS CSS Animations: property <backdrop-filter> from [none] to [hue-rotate(180deg)] at (0.25) is [hue-rotate(45deg)] 
 PASS CSS Animations: property <backdrop-filter> from [none] to [hue-rotate(180deg)] at (0.5) is [hue-rotate(90deg)] 
 PASS CSS Animations: property <backdrop-filter> from [none] to [hue-rotate(180deg)] at (1) is [hue-rotate(180deg)] 
@@ -194,22 +194,22 @@ PASS CSS Animations: property <backdrop-filter> from [hue-rotate(180deg)] to [no
 PASS CSS Animations: property <backdrop-filter> from [hue-rotate(180deg)] to [none] at (0) is [hue-rotate(180deg)] 
 PASS CSS Animations: property <backdrop-filter> from [hue-rotate(180deg)] to [none] at (0.25) is [hue-rotate(135deg)] 
 PASS CSS Animations: property <backdrop-filter> from [hue-rotate(180deg)] to [none] at (0.5) is [hue-rotate(90deg)] 
-PASS CSS Animations: property <backdrop-filter> from [hue-rotate(180deg)] to [none] at (1) is [hue-rotate(0deg)] 
+FAIL CSS Animations: property <backdrop-filter> from [hue-rotate(180deg)] to [none] at (1) is [none] assert_equals: expected "hue - rotate ( 0deg ) " but got "none "
 PASS CSS Animations: property <backdrop-filter> from [hue-rotate(180deg)] to [none] at (1.5) is [hue-rotate(-90deg)] 
 PASS CSS Animations: property <backdrop-filter> from [none] to [blur(10px)] at (-1) is [blur(0px)] 
-PASS CSS Animations: property <backdrop-filter> from [none] to [blur(10px)] at (0) is [blur(0px)] 
+FAIL CSS Animations: property <backdrop-filter> from [none] to [blur(10px)] at (0) is [none] assert_equals: expected "blur ( 0px ) " but got "none "
 PASS CSS Animations: property <backdrop-filter> from [none] to [blur(10px)] at (0.5) is [blur(5px)] 
 PASS CSS Animations: property <backdrop-filter> from [none] to [blur(10px)] at (1) is [blur(10px)] 
 PASS CSS Animations: property <backdrop-filter> from [none] to [blur(10px)] at (1.5) is [blur(15px)] 
 PASS CSS Animations: property <backdrop-filter> from [brightness(0)] to [none] at (-1) is [brightness(0)] 
 PASS CSS Animations: property <backdrop-filter> from [brightness(0)] to [none] at (0) is [brightness(0)] 
 PASS CSS Animations: property <backdrop-filter> from [brightness(0)] to [none] at (0.5) is [brightness(0.5)] 
-PASS CSS Animations: property <backdrop-filter> from [brightness(0)] to [none] at (1) is [brightness(1)] 
+FAIL CSS Animations: property <backdrop-filter> from [brightness(0)] to [none] at (1) is [none] assert_equals: expected "brightness ( 1 ) " but got "none "
 PASS CSS Animations: property <backdrop-filter> from [brightness(0)] to [none] at (1.5) is [brightness(1.5)] 
 PASS CSS Animations: property <backdrop-filter> from [contrast(0)] to [none] at (-1) is [contrast(0)] 
 PASS CSS Animations: property <backdrop-filter> from [contrast(0)] to [none] at (0) is [contrast(0)] 
 PASS CSS Animations: property <backdrop-filter> from [contrast(0)] to [none] at (0.5) is [contrast(0.5)] 
-PASS CSS Animations: property <backdrop-filter> from [contrast(0)] to [none] at (1) is [contrast(1)] 
+FAIL CSS Animations: property <backdrop-filter> from [contrast(0)] to [none] at (1) is [none] assert_equals: expected "contrast ( 1 ) " but got "none "
 PASS CSS Animations: property <backdrop-filter> from [contrast(0)] to [none] at (1.5) is [contrast(1.5)] 
 PASS CSS Animations: property <backdrop-filter> from [none] to [drop-shadow(20px 10px green)] at (-1) is [drop-shadow(rgba(0, 0, 0, 0) -20px -10px 0px)] 
 PASS CSS Animations: property <backdrop-filter> from [none] to [drop-shadow(20px 10px green)] at (0) is [none] 
@@ -222,32 +222,32 @@ PASS CSS Animations: property <backdrop-filter> from [drop-shadow(0px 0px 0px cu
 PASS CSS Animations: property <backdrop-filter> from [drop-shadow(0px 0px 0px currentcolor)] to [drop-shadow(20px 10px green)] at (1) is [drop-shadow(rgb(0, 128, 0) 20px 10px 0px)] 
 PASS CSS Animations: property <backdrop-filter> from [drop-shadow(0px 0px 0px currentcolor)] to [drop-shadow(20px 10px green)] at (1.5) is [drop-shadow(rgb(0, 65, 0) 30px 15px 0px)] 
 PASS CSS Animations: property <backdrop-filter> from [none] to [grayscale(1)] at (-1) is [grayscale(0)] 
-PASS CSS Animations: property <backdrop-filter> from [none] to [grayscale(1)] at (0) is [grayscale(0)] 
+FAIL CSS Animations: property <backdrop-filter> from [none] to [grayscale(1)] at (0) is [none] assert_equals: expected "grayscale ( 0 ) " but got "none "
 PASS CSS Animations: property <backdrop-filter> from [none] to [grayscale(1)] at (0.5) is [grayscale(0.5)] 
 PASS CSS Animations: property <backdrop-filter> from [none] to [grayscale(1)] at (1) is [grayscale(1)] 
 PASS CSS Animations: property <backdrop-filter> from [none] to [grayscale(1)] at (1.5) is [grayscale(1)] 
 PASS CSS Animations: property <backdrop-filter> from [none] to [hue-rotate(360deg)] at (-1) is [hue-rotate(-360deg)] 
-PASS CSS Animations: property <backdrop-filter> from [none] to [hue-rotate(360deg)] at (0) is [hue-rotate(0deg)] 
+FAIL CSS Animations: property <backdrop-filter> from [none] to [hue-rotate(360deg)] at (0) is [none] assert_equals: expected "hue - rotate ( 0deg ) " but got "none "
 PASS CSS Animations: property <backdrop-filter> from [none] to [hue-rotate(360deg)] at (0.5) is [hue-rotate(180deg)] 
 PASS CSS Animations: property <backdrop-filter> from [none] to [hue-rotate(360deg)] at (1) is [hue-rotate(360deg)] 
 PASS CSS Animations: property <backdrop-filter> from [none] to [hue-rotate(360deg)] at (1.5) is [hue-rotate(540deg)] 
 PASS CSS Animations: property <backdrop-filter> from [none] to [invert(1)] at (-1) is [invert(0)] 
-PASS CSS Animations: property <backdrop-filter> from [none] to [invert(1)] at (0) is [invert(0)] 
+FAIL CSS Animations: property <backdrop-filter> from [none] to [invert(1)] at (0) is [none] assert_equals: expected "invert ( 0 ) " but got "none "
 PASS CSS Animations: property <backdrop-filter> from [none] to [invert(1)] at (0.5) is [invert(0.5)] 
 PASS CSS Animations: property <backdrop-filter> from [none] to [invert(1)] at (1) is [invert(1)] 
 PASS CSS Animations: property <backdrop-filter> from [none] to [invert(1)] at (1.5) is [invert(1)] 
 PASS CSS Animations: property <backdrop-filter> from [opacity(0)] to [none] at (-1) is [opacity(0)] 
 PASS CSS Animations: property <backdrop-filter> from [opacity(0)] to [none] at (0) is [opacity(0)] 
 PASS CSS Animations: property <backdrop-filter> from [opacity(0)] to [none] at (0.5) is [opacity(0.5)] 
-PASS CSS Animations: property <backdrop-filter> from [opacity(0)] to [none] at (1) is [opacity(1)] 
+FAIL CSS Animations: property <backdrop-filter> from [opacity(0)] to [none] at (1) is [none] assert_equals: expected "opacity ( 1 ) " but got "none "
 PASS CSS Animations: property <backdrop-filter> from [opacity(0)] to [none] at (1.5) is [opacity(1)] 
 PASS CSS Animations: property <backdrop-filter> from [saturate(0)] to [none] at (-1) is [saturate(0)] 
 PASS CSS Animations: property <backdrop-filter> from [saturate(0)] to [none] at (0) is [saturate(0)] 
 PASS CSS Animations: property <backdrop-filter> from [saturate(0)] to [none] at (0.5) is [saturate(0.5)] 
-PASS CSS Animations: property <backdrop-filter> from [saturate(0)] to [none] at (1) is [saturate(1)] 
+FAIL CSS Animations: property <backdrop-filter> from [saturate(0)] to [none] at (1) is [none] assert_equals: expected "saturate ( 1 ) " but got "none "
 PASS CSS Animations: property <backdrop-filter> from [saturate(0)] to [none] at (1.5) is [saturate(1.5)] 
 PASS CSS Animations: property <backdrop-filter> from [none] to [sepia(1)] at (-1) is [sepia(0)] 
-PASS CSS Animations: property <backdrop-filter> from [none] to [sepia(1)] at (0) is [sepia(0)] 
+FAIL CSS Animations: property <backdrop-filter> from [none] to [sepia(1)] at (0) is [none] assert_equals: expected "sepia ( 0 ) " but got "none "
 PASS CSS Animations: property <backdrop-filter> from [none] to [sepia(1)] at (0.5) is [sepia(0.5)] 
 PASS CSS Animations: property <backdrop-filter> from [none] to [sepia(1)] at (1) is [sepia(1)] 
 PASS CSS Animations: property <backdrop-filter> from [none] to [sepia(1)] at (1.5) is [sepia(1)] 
@@ -308,13 +308,13 @@ PASS Web Animations: property <backdrop-filter> from [grayscale(0) blur(0px)] to
 PASS Web Animations: property <backdrop-filter> from [grayscale(0) blur(0px)] to [blur(10px)] at (1) is [blur(10px)] 
 PASS Web Animations: property <backdrop-filter> from [grayscale(0) blur(0px)] to [blur(10px)] at (1.5) is [blur(10px)] 
 PASS Web Animations: property <backdrop-filter> from [blur(6px)] to [blur(10px) hue-rotate(180deg)] at (-0.5) is [blur(4px) hue-rotate(-90deg)] 
-PASS Web Animations: property <backdrop-filter> from [blur(6px)] to [blur(10px) hue-rotate(180deg)] at (0) is [blur(6px) hue-rotate(0deg)] 
+FAIL Web Animations: property <backdrop-filter> from [blur(6px)] to [blur(10px) hue-rotate(180deg)] at (0) is [blur(6px)] assert_equals: expected "blur ( 6px ) hue - rotate ( 0deg ) " but got "blur ( 6px ) "
 PASS Web Animations: property <backdrop-filter> from [blur(6px)] to [blur(10px) hue-rotate(180deg)] at (0.25) is [blur(7px) hue-rotate(45deg)] 
 PASS Web Animations: property <backdrop-filter> from [blur(6px)] to [blur(10px) hue-rotate(180deg)] at (0.5) is [blur(8px) hue-rotate(90deg)] 
 PASS Web Animations: property <backdrop-filter> from [blur(6px)] to [blur(10px) hue-rotate(180deg)] at (1) is [blur(10px) hue-rotate(180deg)] 
 PASS Web Animations: property <backdrop-filter> from [blur(6px)] to [blur(10px) hue-rotate(180deg)] at (1.5) is [blur(12px) hue-rotate(270deg)] 
 PASS Web Animations: property <backdrop-filter> from [none] to [hue-rotate(180deg)] at (-0.5) is [hue-rotate(-90deg)] 
-PASS Web Animations: property <backdrop-filter> from [none] to [hue-rotate(180deg)] at (0) is [hue-rotate(0deg)] 
+FAIL Web Animations: property <backdrop-filter> from [none] to [hue-rotate(180deg)] at (0) is [none] assert_equals: expected "hue - rotate ( 0deg ) " but got "none "
 PASS Web Animations: property <backdrop-filter> from [none] to [hue-rotate(180deg)] at (0.25) is [hue-rotate(45deg)] 
 PASS Web Animations: property <backdrop-filter> from [none] to [hue-rotate(180deg)] at (0.5) is [hue-rotate(90deg)] 
 PASS Web Animations: property <backdrop-filter> from [none] to [hue-rotate(180deg)] at (1) is [hue-rotate(180deg)] 
@@ -323,22 +323,22 @@ PASS Web Animations: property <backdrop-filter> from [hue-rotate(180deg)] to [no
 PASS Web Animations: property <backdrop-filter> from [hue-rotate(180deg)] to [none] at (0) is [hue-rotate(180deg)] 
 PASS Web Animations: property <backdrop-filter> from [hue-rotate(180deg)] to [none] at (0.25) is [hue-rotate(135deg)] 
 PASS Web Animations: property <backdrop-filter> from [hue-rotate(180deg)] to [none] at (0.5) is [hue-rotate(90deg)] 
-PASS Web Animations: property <backdrop-filter> from [hue-rotate(180deg)] to [none] at (1) is [hue-rotate(0deg)] 
+FAIL Web Animations: property <backdrop-filter> from [hue-rotate(180deg)] to [none] at (1) is [none] assert_equals: expected "hue - rotate ( 0deg ) " but got "none "
 PASS Web Animations: property <backdrop-filter> from [hue-rotate(180deg)] to [none] at (1.5) is [hue-rotate(-90deg)] 
 PASS Web Animations: property <backdrop-filter> from [none] to [blur(10px)] at (-1) is [blur(0px)] 
-PASS Web Animations: property <backdrop-filter> from [none] to [blur(10px)] at (0) is [blur(0px)] 
+FAIL Web Animations: property <backdrop-filter> from [none] to [blur(10px)] at (0) is [none] assert_equals: expected "blur ( 0px ) " but got "none "
 PASS Web Animations: property <backdrop-filter> from [none] to [blur(10px)] at (0.5) is [blur(5px)] 
 PASS Web Animations: property <backdrop-filter> from [none] to [blur(10px)] at (1) is [blur(10px)] 
 PASS Web Animations: property <backdrop-filter> from [none] to [blur(10px)] at (1.5) is [blur(15px)] 
 PASS Web Animations: property <backdrop-filter> from [brightness(0)] to [none] at (-1) is [brightness(0)] 
 PASS Web Animations: property <backdrop-filter> from [brightness(0)] to [none] at (0) is [brightness(0)] 
 PASS Web Animations: property <backdrop-filter> from [brightness(0)] to [none] at (0.5) is [brightness(0.5)] 
-PASS Web Animations: property <backdrop-filter> from [brightness(0)] to [none] at (1) is [brightness(1)] 
+FAIL Web Animations: property <backdrop-filter> from [brightness(0)] to [none] at (1) is [none] assert_equals: expected "brightness ( 1 ) " but got "none "
 PASS Web Animations: property <backdrop-filter> from [brightness(0)] to [none] at (1.5) is [brightness(1.5)] 
 PASS Web Animations: property <backdrop-filter> from [contrast(0)] to [none] at (-1) is [contrast(0)] 
 PASS Web Animations: property <backdrop-filter> from [contrast(0)] to [none] at (0) is [contrast(0)] 
 PASS Web Animations: property <backdrop-filter> from [contrast(0)] to [none] at (0.5) is [contrast(0.5)] 
-PASS Web Animations: property <backdrop-filter> from [contrast(0)] to [none] at (1) is [contrast(1)] 
+FAIL Web Animations: property <backdrop-filter> from [contrast(0)] to [none] at (1) is [none] assert_equals: expected "contrast ( 1 ) " but got "none "
 PASS Web Animations: property <backdrop-filter> from [contrast(0)] to [none] at (1.5) is [contrast(1.5)] 
 PASS Web Animations: property <backdrop-filter> from [none] to [drop-shadow(20px 10px green)] at (-1) is [drop-shadow(rgba(0, 0, 0, 0) -20px -10px 0px)] 
 PASS Web Animations: property <backdrop-filter> from [none] to [drop-shadow(20px 10px green)] at (0) is [none] 
@@ -351,32 +351,32 @@ PASS Web Animations: property <backdrop-filter> from [drop-shadow(0px 0px 0px cu
 PASS Web Animations: property <backdrop-filter> from [drop-shadow(0px 0px 0px currentcolor)] to [drop-shadow(20px 10px green)] at (1) is [drop-shadow(rgb(0, 128, 0) 20px 10px 0px)] 
 PASS Web Animations: property <backdrop-filter> from [drop-shadow(0px 0px 0px currentcolor)] to [drop-shadow(20px 10px green)] at (1.5) is [drop-shadow(rgb(0, 65, 0) 30px 15px 0px)] 
 PASS Web Animations: property <backdrop-filter> from [none] to [grayscale(1)] at (-1) is [grayscale(0)] 
-PASS Web Animations: property <backdrop-filter> from [none] to [grayscale(1)] at (0) is [grayscale(0)] 
+FAIL Web Animations: property <backdrop-filter> from [none] to [grayscale(1)] at (0) is [none] assert_equals: expected "grayscale ( 0 ) " but got "none "
 PASS Web Animations: property <backdrop-filter> from [none] to [grayscale(1)] at (0.5) is [grayscale(0.5)] 
 PASS Web Animations: property <backdrop-filter> from [none] to [grayscale(1)] at (1) is [grayscale(1)] 
 PASS Web Animations: property <backdrop-filter> from [none] to [grayscale(1)] at (1.5) is [grayscale(1)] 
 PASS Web Animations: property <backdrop-filter> from [none] to [hue-rotate(360deg)] at (-1) is [hue-rotate(-360deg)] 
-PASS Web Animations: property <backdrop-filter> from [none] to [hue-rotate(360deg)] at (0) is [hue-rotate(0deg)] 
+FAIL Web Animations: property <backdrop-filter> from [none] to [hue-rotate(360deg)] at (0) is [none] assert_equals: expected "hue - rotate ( 0deg ) " but got "none "
 PASS Web Animations: property <backdrop-filter> from [none] to [hue-rotate(360deg)] at (0.5) is [hue-rotate(180deg)] 
 PASS Web Animations: property <backdrop-filter> from [none] to [hue-rotate(360deg)] at (1) is [hue-rotate(360deg)] 
 PASS Web Animations: property <backdrop-filter> from [none] to [hue-rotate(360deg)] at (1.5) is [hue-rotate(540deg)] 
 PASS Web Animations: property <backdrop-filter> from [none] to [invert(1)] at (-1) is [invert(0)] 
-PASS Web Animations: property <backdrop-filter> from [none] to [invert(1)] at (0) is [invert(0)] 
+FAIL Web Animations: property <backdrop-filter> from [none] to [invert(1)] at (0) is [none] assert_equals: expected "invert ( 0 ) " but got "none "
 PASS Web Animations: property <backdrop-filter> from [none] to [invert(1)] at (0.5) is [invert(0.5)] 
 PASS Web Animations: property <backdrop-filter> from [none] to [invert(1)] at (1) is [invert(1)] 
 PASS Web Animations: property <backdrop-filter> from [none] to [invert(1)] at (1.5) is [invert(1)] 
 PASS Web Animations: property <backdrop-filter> from [opacity(0)] to [none] at (-1) is [opacity(0)] 
 PASS Web Animations: property <backdrop-filter> from [opacity(0)] to [none] at (0) is [opacity(0)] 
 PASS Web Animations: property <backdrop-filter> from [opacity(0)] to [none] at (0.5) is [opacity(0.5)] 
-PASS Web Animations: property <backdrop-filter> from [opacity(0)] to [none] at (1) is [opacity(1)] 
+FAIL Web Animations: property <backdrop-filter> from [opacity(0)] to [none] at (1) is [none] assert_equals: expected "opacity ( 1 ) " but got "none "
 PASS Web Animations: property <backdrop-filter> from [opacity(0)] to [none] at (1.5) is [opacity(1)] 
 PASS Web Animations: property <backdrop-filter> from [saturate(0)] to [none] at (-1) is [saturate(0)] 
 PASS Web Animations: property <backdrop-filter> from [saturate(0)] to [none] at (0) is [saturate(0)] 
 PASS Web Animations: property <backdrop-filter> from [saturate(0)] to [none] at (0.5) is [saturate(0.5)] 
-PASS Web Animations: property <backdrop-filter> from [saturate(0)] to [none] at (1) is [saturate(1)] 
+FAIL Web Animations: property <backdrop-filter> from [saturate(0)] to [none] at (1) is [none] assert_equals: expected "saturate ( 1 ) " but got "none "
 PASS Web Animations: property <backdrop-filter> from [saturate(0)] to [none] at (1.5) is [saturate(1.5)] 
 PASS Web Animations: property <backdrop-filter> from [none] to [sepia(1)] at (-1) is [sepia(0)] 
-PASS Web Animations: property <backdrop-filter> from [none] to [sepia(1)] at (0) is [sepia(0)] 
+FAIL Web Animations: property <backdrop-filter> from [none] to [sepia(1)] at (0) is [none] assert_equals: expected "sepia ( 0 ) " but got "none "
 PASS Web Animations: property <backdrop-filter> from [none] to [sepia(1)] at (0.5) is [sepia(0.5)] 
 PASS Web Animations: property <backdrop-filter> from [none] to [sepia(1)] at (1) is [sepia(1)] 
 PASS Web Animations: property <backdrop-filter> from [none] to [sepia(1)] at (1.5) is [sepia(1)] 
diff --git a/third_party/WebKit/LayoutTests/animations/interpolation/filter-interpolation-expected.txt b/third_party/WebKit/LayoutTests/animations/interpolation/filter-interpolation-expected.txt
index fd8464f7e273a..a183ef06690f4 100644
--- a/third_party/WebKit/LayoutTests/animations/interpolation/filter-interpolation-expected.txt
+++ b/third_party/WebKit/LayoutTests/animations/interpolation/filter-interpolation-expected.txt
@@ -179,13 +179,13 @@ PASS CSS Animations: property <-webkit-filter> from [grayscale(0) blur(0px)] to
 PASS CSS Animations: property <-webkit-filter> from [grayscale(0) blur(0px)] to [blur(10px)] at (1) is [blur(10px)] 
 PASS CSS Animations: property <-webkit-filter> from [grayscale(0) blur(0px)] to [blur(10px)] at (1.5) is [blur(10px)] 
 PASS CSS Animations: property <-webkit-filter> from [blur(6px)] to [blur(10px) hue-rotate(180deg)] at (-0.5) is [blur(4px) hue-rotate(-90deg)] 
-PASS CSS Animations: property <-webkit-filter> from [blur(6px)] to [blur(10px) hue-rotate(180deg)] at (0) is [blur(6px) hue-rotate(0deg)] 
+FAIL CSS Animations: property <-webkit-filter> from [blur(6px)] to [blur(10px) hue-rotate(180deg)] at (0) is [blur(6px)] assert_equals: expected "blur ( 6px ) hue - rotate ( 0deg ) " but got "blur ( 6px ) "
 PASS CSS Animations: property <-webkit-filter> from [blur(6px)] to [blur(10px) hue-rotate(180deg)] at (0.25) is [blur(7px) hue-rotate(45deg)] 
 PASS CSS Animations: property <-webkit-filter> from [blur(6px)] to [blur(10px) hue-rotate(180deg)] at (0.5) is [blur(8px) hue-rotate(90deg)] 
 PASS CSS Animations: property <-webkit-filter> from [blur(6px)] to [blur(10px) hue-rotate(180deg)] at (1) is [blur(10px) hue-rotate(180deg)] 
 PASS CSS Animations: property <-webkit-filter> from [blur(6px)] to [blur(10px) hue-rotate(180deg)] at (1.5) is [blur(12px) hue-rotate(270deg)] 
 PASS CSS Animations: property <-webkit-filter> from [none] to [hue-rotate(180deg)] at (-0.5) is [hue-rotate(-90deg)] 
-PASS CSS Animations: property <-webkit-filter> from [none] to [hue-rotate(180deg)] at (0) is [hue-rotate(0deg)] 
+FAIL CSS Animations: property <-webkit-filter> from [none] to [hue-rotate(180deg)] at (0) is [none] assert_equals: expected "hue - rotate ( 0deg ) " but got "none "
 PASS CSS Animations: property <-webkit-filter> from [none] to [hue-rotate(180deg)] at (0.25) is [hue-rotate(45deg)] 
 PASS CSS Animations: property <-webkit-filter> from [none] to [hue-rotate(180deg)] at (0.5) is [hue-rotate(90deg)] 
 PASS CSS Animations: property <-webkit-filter> from [none] to [hue-rotate(180deg)] at (1) is [hue-rotate(180deg)] 
@@ -194,22 +194,22 @@ PASS CSS Animations: property <-webkit-filter> from [hue-rotate(180deg)] to [non
 PASS CSS Animations: property <-webkit-filter> from [hue-rotate(180deg)] to [none] at (0) is [hue-rotate(180deg)] 
 PASS CSS Animations: property <-webkit-filter> from [hue-rotate(180deg)] to [none] at (0.25) is [hue-rotate(135deg)] 
 PASS CSS Animations: property <-webkit-filter> from [hue-rotate(180deg)] to [none] at (0.5) is [hue-rotate(90deg)] 
-PASS CSS Animations: property <-webkit-filter> from [hue-rotate(180deg)] to [none] at (1) is [hue-rotate(0deg)] 
+FAIL CSS Animations: property <-webkit-filter> from [hue-rotate(180deg)] to [none] at (1) is [none] assert_equals: expected "hue - rotate ( 0deg ) " but got "none "
 PASS CSS Animations: property <-webkit-filter> from [hue-rotate(180deg)] to [none] at (1.5) is [hue-rotate(-90deg)] 
 PASS CSS Animations: property <-webkit-filter> from [none] to [blur(10px)] at (-1) is [blur(0px)] 
-PASS CSS Animations: property <-webkit-filter> from [none] to [blur(10px)] at (0) is [blur(0px)] 
+FAIL CSS Animations: property <-webkit-filter> from [none] to [blur(10px)] at (0) is [none] assert_equals: expected "blur ( 0px ) " but got "none "
 PASS CSS Animations: property <-webkit-filter> from [none] to [blur(10px)] at (0.5) is [blur(5px)] 
 PASS CSS Animations: property <-webkit-filter> from [none] to [blur(10px)] at (1) is [blur(10px)] 
 PASS CSS Animations: property <-webkit-filter> from [none] to [blur(10px)] at (1.5) is [blur(15px)] 
 PASS CSS Animations: property <-webkit-filter> from [brightness(0)] to [none] at (-1) is [brightness(0)] 
 PASS CSS Animations: property <-webkit-filter> from [brightness(0)] to [none] at (0) is [brightness(0)] 
 PASS CSS Animations: property <-webkit-filter> from [brightness(0)] to [none] at (0.5) is [brightness(0.5)] 
-PASS CSS Animations: property <-webkit-filter> from [brightness(0)] to [none] at (1) is [brightness(1)] 
+FAIL CSS Animations: property <-webkit-filter> from [brightness(0)] to [none] at (1) is [none] assert_equals: expected "brightness ( 1 ) " but got "none "
 PASS CSS Animations: property <-webkit-filter> from [brightness(0)] to [none] at (1.5) is [brightness(1.5)] 
 PASS CSS Animations: property <-webkit-filter> from [contrast(0)] to [none] at (-1) is [contrast(0)] 
 PASS CSS Animations: property <-webkit-filter> from [contrast(0)] to [none] at (0) is [contrast(0)] 
 PASS CSS Animations: property <-webkit-filter> from [contrast(0)] to [none] at (0.5) is [contrast(0.5)] 
-PASS CSS Animations: property <-webkit-filter> from [contrast(0)] to [none] at (1) is [contrast(1)] 
+FAIL CSS Animations: property <-webkit-filter> from [contrast(0)] to [none] at (1) is [none] assert_equals: expected "contrast ( 1 ) " but got "none "
 PASS CSS Animations: property <-webkit-filter> from [contrast(0)] to [none] at (1.5) is [contrast(1.5)] 
 PASS CSS Animations: property <-webkit-filter> from [none] to [drop-shadow(20px 10px green)] at (-1) is [drop-shadow(rgba(0, 0, 0, 0) -20px -10px 0px)] 
 PASS CSS Animations: property <-webkit-filter> from [none] to [drop-shadow(20px 10px green)] at (0) is [none] 
@@ -222,32 +222,32 @@ PASS CSS Animations: property <-webkit-filter> from [drop-shadow(0px 0px 0px cur
 PASS CSS Animations: property <-webkit-filter> from [drop-shadow(0px 0px 0px currentcolor)] to [drop-shadow(20px 10px green)] at (1) is [drop-shadow(rgb(0, 128, 0) 20px 10px 0px)] 
 PASS CSS Animations: property <-webkit-filter> from [drop-shadow(0px 0px 0px currentcolor)] to [drop-shadow(20px 10px green)] at (1.5) is [drop-shadow(rgb(0, 65, 0) 30px 15px 0px)] 
 PASS CSS Animations: property <-webkit-filter> from [none] to [grayscale(1)] at (-1) is [grayscale(0)] 
-PASS CSS Animations: property <-webkit-filter> from [none] to [grayscale(1)] at (0) is [grayscale(0)] 
+FAIL CSS Animations: property <-webkit-filter> from [none] to [grayscale(1)] at (0) is [none] assert_equals: expected "grayscale ( 0 ) " but got "none "
 PASS CSS Animations: property <-webkit-filter> from [none] to [grayscale(1)] at (0.5) is [grayscale(0.5)] 
 PASS CSS Animations: property <-webkit-filter> from [none] to [grayscale(1)] at (1) is [grayscale(1)] 
 PASS CSS Animations: property <-webkit-filter> from [none] to [grayscale(1)] at (1.5) is [grayscale(1)] 
 PASS CSS Animations: property <-webkit-filter> from [none] to [hue-rotate(360deg)] at (-1) is [hue-rotate(-360deg)] 
-PASS CSS Animations: property <-webkit-filter> from [none] to [hue-rotate(360deg)] at (0) is [hue-rotate(0deg)] 
+FAIL CSS Animations: property <-webkit-filter> from [none] to [hue-rotate(360deg)] at (0) is [none] assert_equals: expected "hue - rotate ( 0deg ) " but got "none "
 PASS CSS Animations: property <-webkit-filter> from [none] to [hue-rotate(360deg)] at (0.5) is [hue-rotate(180deg)] 
 PASS CSS Animations: property <-webkit-filter> from [none] to [hue-rotate(360deg)] at (1) is [hue-rotate(360deg)] 
 PASS CSS Animations: property <-webkit-filter> from [none] to [hue-rotate(360deg)] at (1.5) is [hue-rotate(540deg)] 
 PASS CSS Animations: property <-webkit-filter> from [none] to [invert(1)] at (-1) is [invert(0)] 
-PASS CSS Animations: property <-webkit-filter> from [none] to [invert(1)] at (0) is [invert(0)] 
+FAIL CSS Animations: property <-webkit-filter> from [none] to [invert(1)] at (0) is [none] assert_equals: expected "invert ( 0 ) " but got "none "
 PASS CSS Animations: property <-webkit-filter> from [none] to [invert(1)] at (0.5) is [invert(0.5)] 
 PASS CSS Animations: property <-webkit-filter> from [none] to [invert(1)] at (1) is [invert(1)] 
 PASS CSS Animations: property <-webkit-filter> from [none] to [invert(1)] at (1.5) is [invert(1)] 
 PASS CSS Animations: property <-webkit-filter> from [opacity(0)] to [none] at (-1) is [opacity(0)] 
 PASS CSS Animations: property <-webkit-filter> from [opacity(0)] to [none] at (0) is [opacity(0)] 
 PASS CSS Animations: property <-webkit-filter> from [opacity(0)] to [none] at (0.5) is [opacity(0.5)] 
-PASS CSS Animations: property <-webkit-filter> from [opacity(0)] to [none] at (1) is [opacity(1)] 
+FAIL CSS Animations: property <-webkit-filter> from [opacity(0)] to [none] at (1) is [none] assert_equals: expected "opacity ( 1 ) " but got "none "
 PASS CSS Animations: property <-webkit-filter> from [opacity(0)] to [none] at (1.5) is [opacity(1)] 
 PASS CSS Animations: property <-webkit-filter> from [saturate(0)] to [none] at (-1) is [saturate(0)] 
 PASS CSS Animations: property <-webkit-filter> from [saturate(0)] to [none] at (0) is [saturate(0)] 
 PASS CSS Animations: property <-webkit-filter> from [saturate(0)] to [none] at (0.5) is [saturate(0.5)] 
-PASS CSS Animations: property <-webkit-filter> from [saturate(0)] to [none] at (1) is [saturate(1)] 
+FAIL CSS Animations: property <-webkit-filter> from [saturate(0)] to [none] at (1) is [none] assert_equals: expected "saturate ( 1 ) " but got "none "
 PASS CSS Animations: property <-webkit-filter> from [saturate(0)] to [none] at (1.5) is [saturate(1.5)] 
 PASS CSS Animations: property <-webkit-filter> from [none] to [sepia(1)] at (-1) is [sepia(0)] 
-PASS CSS Animations: property <-webkit-filter> from [none] to [sepia(1)] at (0) is [sepia(0)] 
+FAIL CSS Animations: property <-webkit-filter> from [none] to [sepia(1)] at (0) is [none] assert_equals: expected "sepia ( 0 ) " but got "none "
 PASS CSS Animations: property <-webkit-filter> from [none] to [sepia(1)] at (0.5) is [sepia(0.5)] 
 PASS CSS Animations: property <-webkit-filter> from [none] to [sepia(1)] at (1) is [sepia(1)] 
 PASS CSS Animations: property <-webkit-filter> from [none] to [sepia(1)] at (1.5) is [sepia(1)] 
diff --git a/third_party/WebKit/LayoutTests/animations/webkit-filter-default-arg-crash.html b/third_party/WebKit/LayoutTests/animations/webkit-filter-default-arg-crash.html
new file mode 100644
index 0000000000000..27d382d745744
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/animations/webkit-filter-default-arg-crash.html
@@ -0,0 +1,59 @@
+<!DOCTYPE html>
+<script src="../resources/testharness.js"></script>
+<script src="../resources/testharnessreport.js"></script>
+<style>
+@keyframes anim-blur {
+  from { -webkit-filter: blur(); }
+  to { -webkit-filter: blur(1px); }
+}
+@keyframes anim-brightness {
+  from { -webkit-filter: brightness(); }
+  to { -webkit-filter: brightness(1); }
+}
+@keyframes anim-contrast {
+  from { -webkit-filter: contrast(); }
+  to { -webkit-filter: contrast(1); }
+}
+@keyframes anim-drop-shadow {
+  from { -webkit-filter: drop-shadow(); }
+  to { -webkit-filter: drop-shadow(1px 1px); }
+}
+@keyframes anim-grayscale {
+  from { -webkit-filter: grayscale(); }
+  to { -webkit-filter: grayscale(1); }
+}
+@keyframes anim-hue-rotate {
+  from { -webkit-filter: hue-rotate(); }
+  to { -webkit-filter: hue-rotate(1deg); }
+}
+@keyframes anim-invert {
+  from { -webkit-filter: invert(); }
+  to { -webkit-filter: invert(1); }
+}
+@keyframes anim-opacity {
+  from { -webkit-filter: opacity(); }
+  to { -webkit-filter: opacity(1); }
+}
+@keyframes anim-sepia {
+  from { -webkit-filter: sepia(); }
+  to { -webkit-filter: sepia(1); }
+}
+@keyframes anim-saturate {
+  from { -webkit-filter: saturate(); }
+  to { -webkit-filter: saturate(1); }
+}
+</style>
+<div style="animation: anim-blur 1s"></div>
+<div style="animation: anim-brightness 1s"></div>
+<div style="animation: anim-contrast 1s"></div>
+<div style="animation: anim-drop-shadow 1s"></div>
+<div style="animation: anim-grayscale 1s"></div>
+<div style="animation: anim-hue-rotate 1s"></div>
+<div style="animation: anim-invert 1s"></div>
+<div style="animation: anim-opacity 1s"></div>
+<div style="animation: anim-sepia 1s"></div>
+<div style="animation: anim-saturate 1s"></div>
+<script>
+var asyncHandle = async_test("Don't crash when animating default filter parameters.");
+requestAnimationFrame(() => asyncHandle.done());
+</script>
diff --git a/third_party/WebKit/Source/core/animation/StringKeyframe.cpp b/third_party/WebKit/Source/core/animation/StringKeyframe.cpp
index 220ab38a44d4a..b20d800c2c7dd 100644
--- a/third_party/WebKit/Source/core/animation/StringKeyframe.cpp
+++ b/third_party/WebKit/Source/core/animation/StringKeyframe.cpp
@@ -205,17 +205,6 @@ PassRefPtr<Interpolation> StringKeyframe::CSSPropertySpecificKeyframe::maybeCrea
         break;
     }
 
-    case CSSPropertyWebkitFilter:
-    case CSSPropertyBackdropFilter: {
-        RefPtr<Interpolation> interpolation = FilterStyleInterpolation::maybeCreateList(*fromCSSValue, *toCSSValue, property);
-        if (interpolation)
-            return interpolation.release();
-
-        // FIXME: Support drop shadow interpolation.
-        return createLegacyStyleInterpolation(property, end, element, baseStyle);
-        break;
-    }
-
     case CSSPropertyScale: {
         RefPtr<Interpolation> interpolation = ListStyleInterpolation<DoubleStyleInterpolation>::maybeCreateFromList(*fromCSSValue, *toCSSValue, property, range);
         if (interpolation)