cc: Use the correct internal format for glCopyTexImage2D calls.

blimp/client/feature/compositor/blimp_output_surface.cc

 // Copyright 2015 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 "blimp/client/feature/compositor/blimp_output_surface.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
+#include "blimp/client/feature/compositor/blimp_context_provider.h"
 #include "cc/output/output_surface_client.h"
 #include "gpu/command_buffer/client/context_support.h"
 
 namespace blimp {
 namespace client {
 
 BlimpOutputSurface::BlimpOutputSurface(
-    scoped_refptr<cc::ContextProvider> context_provider)
+    scoped_refptr<BlimpContextProvider> context_provider)
     : cc::OutputSurface(std::move(context_provider), nullptr, nullptr) {}
 
 BlimpOutputSurface::~BlimpOutputSurface() {}
 
 void BlimpOutputSurface::SwapBuffers(cc::CompositorFrame* frame) {
   // See cc::OutputSurface::SwapBuffers() comment for details.
   context_provider_->ContextSupport()->Swap();
   client_->DidSwapBuffers();
   cc::OutputSurface::PostSwapBuffersComplete();
 }
 
+uint32_t BlimpOutputSurface::GetFramebufferCopyTextureFormat() {
+  auto* gl = static_cast<BlimpContextProvider*>(context_provider());
+  return gl->GetCopyTextureInternalFormat();
+}
+
 }  // namespace client
 }  // namespace blimp