Disable failing WebGL Field pyauto-based perf test on all platforms.

BUG=132797
TEST=None
NOTRY=true

Review URL: https://chromiumcodereview.appspot.com/10540161

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@142169 0039d316-1c4b-4281-b951-d872f2087c98