diff --git a/chrome/browser/ui/search/search_tab_helper.cc b/chrome/browser/ui/search/search_tab_helper.cc
index b610cee66d127..36cf06ab2574a 100644
--- a/chrome/browser/ui/search/search_tab_helper.cc
+++ b/chrome/browser/ui/search/search_tab_helper.cc
@@ -46,6 +46,7 @@
 #include "content/public/browser/user_metrics.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/referrer.h"
+#include "google_apis/gaia/gaia_auth_util.h"
 #include "net/base/net_errors.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/page_transition_types.h"
@@ -563,9 +564,9 @@ void SearchTabHelper::PasteIntoOmnibox(const base::string16& text) {
 void SearchTabHelper::OnChromeIdentityCheck(const base::string16& identity) {
   SigninManagerBase* manager = SigninManagerFactory::GetForProfile(profile());
   if (manager) {
-    const base::string16 username =
-        base::UTF8ToUTF16(manager->GetAuthenticatedUsername());
-    ipc_router_.SendChromeIdentityCheckResult(identity, identity == username);
+    ipc_router_.SendChromeIdentityCheckResult(
+        identity, gaia::AreEmailsSame(base::UTF16ToUTF8(identity),
+                                      manager->GetAuthenticatedUsername()));
   } else {
     ipc_router_.SendChromeIdentityCheckResult(identity, false);
   }
diff --git a/chrome/browser/ui/search/search_tab_helper.h b/chrome/browser/ui/search/search_tab_helper.h
index 764afa188ee64..c5397bb4e42e3 100644
--- a/chrome/browser/ui/search/search_tab_helper.h
+++ b/chrome/browser/ui/search/search_tab_helper.h
@@ -113,7 +113,10 @@ class SearchTabHelper : public content::WebContentsObserver,
   FRIEND_TEST_ALL_PREFIXES(SearchTabHelperTest,
                            OnChromeIdentityCheckMatch);
   FRIEND_TEST_ALL_PREFIXES(SearchTabHelperTest,
-                           OnChromeIdentityCheckMismatch);
+                           OnChromeIdentityCheckMatchSlightlyDifferentGmail);
+  FRIEND_TEST_ALL_PREFIXES(SearchTabHelperTest,
+                           OnChromeIdentityCheckMatchSlightlyDifferentGmail2);
+  FRIEND_TEST_ALL_PREFIXES(SearchTabHelperTest, OnChromeIdentityCheckMismatch);
   FRIEND_TEST_ALL_PREFIXES(SearchTabHelperTest,
                            OnChromeIdentityCheckSignedOutMatch);
   FRIEND_TEST_ALL_PREFIXES(SearchTabHelperTest,
diff --git a/chrome/browser/ui/search/search_tab_helper_unittest.cc b/chrome/browser/ui/search/search_tab_helper_unittest.cc
index 0264ae2118037..8b3f7789f3a68 100644
--- a/chrome/browser/ui/search/search_tab_helper_unittest.cc
+++ b/chrome/browser/ui/search/search_tab_helper_unittest.cc
@@ -193,6 +193,53 @@ TEST_F(SearchTabHelperTest, OnChromeIdentityCheckMatch) {
   ASSERT_TRUE(get<1>(params));
 }
 
+TEST_F(SearchTabHelperTest, OnChromeIdentityCheckMatchSlightlyDifferentGmail) {
+  NavigateAndCommit(GURL(chrome::kChromeSearchLocalNtpUrl));
+  CreateSigninManager(std::string("foobar123@gmail.com"));
+  SearchTabHelper* search_tab_helper =
+      SearchTabHelper::FromWebContents(web_contents());
+  ASSERT_NE(static_cast<SearchTabHelper*>(NULL), search_tab_helper);
+
+  // For gmail, canonicalization is done so that email addresses have a
+  // standard form.
+  const base::string16 test_identity =
+      base::ASCIIToUTF16("Foo.Bar.123@gmail.com");
+  search_tab_helper->OnChromeIdentityCheck(test_identity);
+
+  const IPC::Message* message = process()->sink().GetUniqueMessageMatching(
+      ChromeViewMsg_ChromeIdentityCheckResult::ID);
+  ASSERT_TRUE(message != NULL);
+
+  ChromeViewMsg_ChromeIdentityCheckResult::Param params;
+  ChromeViewMsg_ChromeIdentityCheckResult::Read(message, &params);
+  EXPECT_EQ(test_identity, get<0>(params));
+  ASSERT_TRUE(get<1>(params));
+}
+
+TEST_F(SearchTabHelperTest, OnChromeIdentityCheckMatchSlightlyDifferentGmail2) {
+  NavigateAndCommit(GURL(chrome::kChromeSearchLocalNtpUrl));
+  //
+  CreateSigninManager(std::string("chrome.guy.7FOREVER"));
+  SearchTabHelper* search_tab_helper =
+      SearchTabHelper::FromWebContents(web_contents());
+  ASSERT_NE(static_cast<SearchTabHelper*>(NULL), search_tab_helper);
+
+  // For gmail/googlemail, canonicalization is done so that email addresses have
+  // a standard form.
+  const base::string16 test_identity =
+      base::ASCIIToUTF16("chromeguy7forever@googlemail.com");
+  search_tab_helper->OnChromeIdentityCheck(test_identity);
+
+  const IPC::Message* message = process()->sink().GetUniqueMessageMatching(
+      ChromeViewMsg_ChromeIdentityCheckResult::ID);
+  ASSERT_TRUE(message != NULL);
+
+  ChromeViewMsg_ChromeIdentityCheckResult::Param params;
+  ChromeViewMsg_ChromeIdentityCheckResult::Read(message, &params);
+  EXPECT_EQ(test_identity, get<0>(params));
+  ASSERT_TRUE(get<1>(params));
+}
+
 TEST_F(SearchTabHelperTest, OnChromeIdentityCheckMismatch) {
   NavigateAndCommit(GURL(chrome::kChromeSearchLocalNtpUrl));
   CreateSigninManager(std::string("foo@bar.com"));