Work around about:gpucrash tab crashes caused by impl-side painting.

This is a temporary workaround. The reason for the tab crashes should
be investigated and fixed, since if it happens the context is lost
early in a tab's lifetime, this bug will be triggered.

BUG=365904,368107
TBR=bajones@chromium.org

Review URL: https://codereview.chromium.org/252123003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@266819 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed