Retry gpu compositing when fallback is not true.

If the GPU process goes down, and the renderer tries to recreate its
context too soon, it will fail. We should retry using GPU compositing
until fallback is given as true from the compositor to allow fallback
into software compositing.

R=jbauman@chromium.org, piman@chromium.org
BUG=356453,327220

Review URL: https://codereview.chromium.org/212103005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@259668 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed