Suppress a couple of layout tests before V8 change is rolled

      Two tests have custom expectations until V8 change fixing stack overflow reporting is rolled.

TBR=antonm
BUG=None
TEST=None

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@80929 0039d316-1c4b-4281-b951-d872f2087c98