[Chromium] Add CHROMIUM_texture_from_image extension support.
https://bugs.webkit.org/show_bug.cgi?id=99894

Patch by David Reveman <reveman@chromium.org> on 2012-10-23
Reviewed by James Robinson.

Add bindTexImage2DCHROMIUM and releaseTexImage2DCHROMIUM prototypes to
WebGraphicsContext3D.h.

* chromium/public/WebGraphicsContext3D.h:
(WebGraphicsContext3D):
(WebKit::WebGraphicsContext3D::bindTexImage2DCHROMIUM):
(WebKit::WebGraphicsContext3D::releaseTexImage2DCHROMIUM):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk/Source/Platform/chromium/public@132256 268f45cc-cd09-0410-ab3c-d52691b4dbfc