Added OSMesa based GLContext.
- Renders 3D using Mesa offscreen software renderer.
- Will be used to run 3D tests on bots that do not support native OpenGL.
- Extended glew library to use the osmesa shared library instead of the regular OpenGL one if it is in the search path.
- Only works on Windows with this changelist, though other platforms will continue to use native OpenGL.
- Added a stub GLContext implementation for use in unit tests.
Review URL: http://codereview.chromium.org/1629029
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@45093 0039d316-1c4b-4281-b951-d872f2087c98
18 files changed
