Clean up outdated gpu driver bug workarounds for Mac 10.9

Tested with NVIDIA, AMD, Intel HD 3000/4000

Actually I also tested with 10.8.5, but at this point I don't
think it's worth making any changes on 10.8.5.

BUG=349137
TEST=
R=kbr@chromium.org

Review URL: https://codereview.chromium.org/189263017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255833 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255833