(not for commit) Create 2nd ContextProvider for Ganesh rasterization.

content/renderer/gpu/compositor_output_surface.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_RENDERER_GPU_COMPOSITOR_OUTPUT_SURFACE_H_
 #define CONTENT_RENDERER_GPU_COMPOSITOR_OUTPUT_SURFACE_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
@@ skipping 25 matching lines @@
 // This class can be created only on the main thread, but then becomes pinned
 // to a fixed thread when bindToClient is called.
 class CompositorOutputSurface
     : NON_EXPORTED_BASE(public cc::OutputSurface),
       NON_EXPORTED_BASE(public base::NonThreadSafe) {
  public:
   CompositorOutputSurface(
       int32 routing_id,
       uint32 output_surface_id,
       const scoped_refptr<ContextProviderCommandBuffer>& context_provider,
+      const scoped_refptr<ContextProviderCommandBuffer>&
+          worker_context_provider,
       scoped_ptr<cc::SoftwareOutputDevice> software,
       scoped_refptr<FrameSwapMessageQueue> swap_frame_message_queue,
       bool use_swap_compositor_frame_message);
   ~CompositorOutputSurface() override;
 
   // cc::OutputSurface implementation.
   bool BindToClient(cc::OutputSurfaceClient* client) override;
   void SwapBuffers(cc::CompositorFrame* frame) override;
 
   // TODO(epenner): This seems out of place here and would be a better fit
@@ skipping 34 matching lines @@
   void OnMessageReceived(const IPC::Message& message);
   void OnUpdateVSyncParametersFromBrowser(base::TimeTicks timebase,
                                           base::TimeDelta interval);
   bool Send(IPC::Message* message);
 
   bool use_swap_compositor_frame_message_;
 
   scoped_refptr<CompositorForwardingMessageFilter> output_surface_filter_;
   CompositorForwardingMessageFilter::Handler output_surface_filter_handler_;
   scoped_refptr<CompositorOutputSurfaceProxy> output_surface_proxy_;
+  scoped_refptr<cc::ContextProvider> worker_context_provider_;
   scoped_refptr<IPC::SyncMessageFilter> message_sender_;
   scoped_refptr<FrameSwapMessageQueue> frame_swap_message_queue_;
   int routing_id_;
   bool prefers_smoothness_;
   base::PlatformThreadHandle main_thread_handle_;
 
   // TODO(danakj): Remove this when crbug.com/311404
   bool layout_test_mode_;
   scoped_ptr<cc::CompositorFrameAck> layout_test_previous_frame_ack_;
   base::WeakPtrFactory<CompositorOutputSurface> weak_ptrs_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_GPU_COMPOSITOR_OUTPUT_SURFACE_H_