https://bugs.webkit.org/show_bug.cgi?id=30091

        Removed old versions of get calls on WebGLRenderingContext and
        added new ones per spec returning "any". New code simplifies
        GraphicsContext3D and fixes previously unimplemented routines.
        Added custom JS and V8 bindings. Added exhaustive test case
        exercising all new code paths. Updated preexisting test cases for
        new APIs. Fixed preexisting bugs in WebKit's and Chrome's WebGL
        implementations.

        Ran WebGL layout tests in WebKit (clean) and Chrome (couple of
        preexisting known failures) and manual WebGL tests in both
        browsers.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@51348 268f45cc-cd09-0410-ab3c-d52691b4dbfc