Expose GLES2Interface to cc

This exposes a gpu::gles2::GLES2Interface pointer to cc through the ContextProvider.  This is a way for the compositor to talk to the client side of the command buffer more directly, bypassing the blink::WebGraphicsContext3D indirection.  See the bug for the plan for using this new interface and deprecating WGC3D.

BUG=181120

Review URL: https://codereview.chromium.org/54463007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238809 0039d316-1c4b-4281-b951-d872f2087c98
This is the sixth CL of several that will eventually replace TokenService with
ProfileOAuth2TokenService. In this CL, TokenService is removed from code base.

BUG=305247

Review URL: https://codereview.chromium.org/91533002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238810 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 238809
Remove content/renderer/media/crypto/key_systems_info.*

KeySystemNameForUMAInternal() is moved to key_systems.cc.

TBR=jochen@chromium.org

Review URL: https://codereview.chromium.org/105173002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238811 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 238811