Added --use-gl command line flag to select GL implementation.
- Options are desktop, egl and osmesa.
- Also added support for bliting an OSMesa bask buffer to a GDK window.

TEST=trybots, manual verification that WebGL and Pepper 3D work
BUG=45898

Review URL: http://codereview.chromium.org/2825005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src/third_party/mesa/MesaLib@52388 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed