Factor out code from WebGraphicsContext3DInProcessImpl
Move the internal GLInProcessContext class to gpu/command_buffer/client.
This works towards these goals:
- Unifying the WGC3D impls to be able to have one unified class that is simply
a shim from WGC3D to GLES2
- Factor out the in-process version so that non-webkit code can use it without depending on webkit
TBR=jamesr@chromium.org, piman@chromium.org
Review URL: https://codereview.chromium.org/
16851003
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@208612 0039d316-1c4b-4281-b951-d872f2087c98