Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@284410 0039d316-1c4b-4281-b951-d872f2087c98

.DEPS.git

@@ -9,7 +9,7 @@ vars = {
     'git_url':
          'https://chromium.googlesource.com',
     'webkit_rev':
-         '@37e3a6f2f0b258bc3daf1ce932226dcef5f677d4',
+         '@54310f3eb6852a1fbdc9555ca58b4588945dc834',
     'angle_revision':
          '11c26b9c1182c9872693bab0b1fbf0fac148ab73'
 }