GitLab

Once all pages are force composited by default, this allows these tests
to not explode when trying to create GraphicsLayers because of a lack of
Platform::compositorSupport.

BUG=361729

Review URL: https://codereview.chromium.org/287043002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@271794 0039d316-1c4b-4281-b951-d872f2087c98