A bunch of tests crash in Mac 10.6 debug.

dominik.rottsches@intel.com said he would take care of it.

BUG=418091
TEST=
TBR=zmo@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/611383010

git-svn-id: svn://svn.chromium.org/blink/trunk@182995 bbb929c8-8fbe-4397-9dbb-9b2b20218538