Reland 101545 - Moved code not relating to GPU scheduling out of GpuS…

…cheduler and into GpuCommandBufferStub.

Reason for revert: Compile failure on Arm.

This was mostly a refactor because the code was awkward.

I also deleted the original gles2_demo since we have the gles2 book demos now.

THings still to do are a common way of setting up the few objects involved in initializing a command buffer that is now more-or-less duplicated in the gles2 conformance tests, the gles2 demos, the command buffer stub and the in-process webgl context. I also want to completely remove the reference to the decoder from the scheduler.

I tested WebGL on both windows and mac and saw no regressions. I checked the conformance tests, the gpu tests and am running by the try bots now. The gles2 demos still work.
Review URL: http://codereview.chromium.org/7782041
Review URL: http://codereview.chromium.org/7951008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@101873 0039d316-1c4b-4281-b951-d872f2087c98

content/common/gpu/gpu_channel.cc

@@ -356,7 +356,7 @@ void GpuChannel::OnCreateTransportTexture(int32 context_route_id,
    int32 route_id = GenerateRouteID();
 
    scoped_ptr<TransportTexture> transport(
-       new TransportTexture(this, channel_.get(), stub->scheduler()->decoder(),
+       new TransportTexture(this, channel_.get(), stub->decoder(),
                             host_id, route_id));
    router_.AddRoute(route_id, transport.get());
    transport_textures_.AddWithID(transport.release(), route_id);