http://codereview.appspot.com/6050054/
Signed-off-by: Nicolas Capens
Signed-off-by: Daniel Koch
Authored-by: Jin Yang

With this patch, my HTML5 2D canvas benchmark with Chromium on Windows7 with GPU
acceleration can boost about 4% though the most execution time is in GPU.

git-svn-id: https://angleproject.googlecode.com/svn/trunk@1067 736b8ea6-26fd-11df-bfd4-992fa37f6226