Allow conformance/ogles/GL/control_flow/control_flow_009_to_010.html on mac 10.8 ATI/NVIDIA

It only fails on 10.7 or Intel GPUs

BUG=322795
TEST=
TBR=bajones@chromium.org,kbr@chromium.org

Review URL: https://codereview.chromium.org/84473002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236949 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 236949