[Win, Mac] Skip the profile editing fields from the tabbing loop.

This will make the first tab go to the:
- Switch Person button for signed in profiles
- the authentication error button for signed in profiles with an error
- the "sign in" button for local profiles

BUG=414794

Review URL: https://codereview.chromium.org/605323002

Cr-Commit-Position: refs/heads/master@{#297561}

chrome/browser/ui/cocoa/profiles/profile_chooser_controller.mm

@@ -449,15 +449,7 @@ - (void)drawWithFrame:(NSRect)frame inView:(NSView *)controlView {
   // Display everything as a circle that spans the entire control.
   NSBezierPath* path = [NSBezierPath bezierPathWithOvalInRect:frame];
   [path addClip];
-
   [super drawImage:[self image] withFrame:frame inView:controlView];
-
-  // Focus ring.
-  if ([self showsFirstResponder]) {
-    [[[NSColor keyboardFocusIndicatorColor] colorWithAlphaComponent:1] set];
-    [path setLineWidth:kFocusRingLineWidth];
-    [path stroke];
-  }
 }
 @end
 
@@ -554,6 +546,10 @@ - (void)setHoverState:(HoverState)state {
   [changePhotoImage_ setHidden:([self hoverState] == kHoverStateNone)];
 }
 
+- (BOOL)canBecomeKeyView {
+  return false;
+}
+
 - (BOOL)accessibilityIsIgnored {
   return NO;
 }
@@ -691,6 +687,10 @@ - (void)showEditableView:(id)sender {
   [[self window] makeFirstResponder:profileNameTextField_];
 }
 
+- (BOOL)canBecomeKeyView {
+  return false;
+}
+
 @end
 
 // A custom button that allows for setting a background color when hovered over.

chrome/browser/ui/views/profiles/profile_chooser_view.cc

@@ -232,7 +232,6 @@ class EditableProfilePhoto : public views::LabelButton {
       return;
     }
 
-    SetFocusable(true);
     set_notify_enter_exit_on_child(true);
 
     // Photo overlay that appears when hovering over the button.
@@ -315,7 +314,6 @@ class EditableProfileName : public RightAlignedIconLabelButton,
       return;
     }
 
-    SetFocusable(true);
     // Show an "edit" pencil icon when hovering over. In the default state,
     // we need to create an empty placeholder of the correct size, so that
     // the text doesn't jump around when the hovered icon appears.