Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@288031 0039d316-1c4b-4281-b951-d872f2087c98

.DEPS.git

@@ -9,7 +9,7 @@ vars = {
     'git_url':
          'https://chromium.googlesource.com',
     'webkit_rev':
-         '@fbf72fdaa464ecde8e25053aa73a5f66d087fac9',
+         '@a8f8aefbdd8fd6997400025705cc24ca3ef51d4e',
     'angle_revision':
          'd9ba4f7318979e927c7a3320c5746c25381eae90'
 }