Update .DEPS.git

Cr-Commit-Position: refs/heads/master@{#290115}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@290115 0039d316-1c4b-4281-b951-d872f2087c98

.DEPS.git

@@ -9,7 +9,7 @@ vars = {
     'git_url':
          'https://chromium.googlesource.com',
     'webkit_rev':
-         '@13e1af0b920f0bc8425238b1961bbd28e2c88c9a',
+         '@be09424ddd2122b0f21498edd1c48a98ba96c9a4',
     'angle_revision':
          'bc75f36b04c8bab99bcecf8cdca16ecee3ac58ee'
 }