cc: Use the correct internal format for glCopyTexImage2D calls.

components/mus/public/cpp/lib/output_surface.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/mus/public/cpp/output_surface.h"
 
 #include "base/bind.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_ack.h"
 #include "cc/output/output_surface_client.h"
@@ skipping 16 matching lines @@
   surface_->BindToThread();
   surface_->set_client(this);
   return cc::OutputSurface::BindToClient(client);
 }
 
 void OutputSurface::DetachFromClient() {
   surface_.reset();
   cc::OutputSurface::DetachFromClient();
 }
 
+void OutputSurface::BindFramebuffer() {
+  // This is a delegating output surface, no framebuffer/direct drawing support.

[sky, 2016/06/21 23:40:35]

Thanks for the comments!

+  NOTREACHED();
+}
+
+uint32_t OutputSurface::GetFramebufferCopyTextureFormat() {
+  // This is a delegating output surface, no framebuffer/direct drawing support.
+  NOTREACHED();
+  return 0;
+}
+
 void OutputSurface::SwapBuffers(cc::CompositorFrame* frame) {
   // TODO(fsamuel, rjkroege): We should probably throttle compositor frames.
   client_->DidSwapBuffers();
   // OutputSurface owns WindowSurface, and so if OutputSurface is
   // destroyed then SubmitCompositorFrame's callback will never get called.
   // Thus, base::Unretained is safe here.
   surface_->SubmitCompositorFrame(
       cc::mojom::CompositorFrame::From(*frame),
       base::Bind(&OutputSurface::SwapBuffersComplete, base::Unretained(this)));
 }
 
 void OutputSurface::OnResourcesReturned(
     mus::WindowSurface* surface,
     mojo::Array<cc::ReturnedResource> resources) {
   cc::CompositorFrameAck cfa;
   cfa.resources = resources.To<cc::ReturnedResourceArray>();
   ReclaimResources(&cfa);
 }
 
 void OutputSurface::SwapBuffersComplete() {
   client_->DidSwapBuffersComplete();
 }
 
 }  // namespace mus