Fix the remaining issue of seperating WebGL from the default share group
Fix the remaining issue of seperating WebGL from the default share group

BUG=351956

Review URL: https://codereview.chromium.org/214733002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@170292 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs