Revert of cc: Implement shared worker contexts.

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 33 matching lines @@
       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 DetachFromClient() override;
   void SwapBuffers(cc::CompositorFrame* frame) override;
 
   // TODO(epenner): This seems out of place here and would be a better fit
   // int CompositorThread after it is fully refactored (http://crbug/170828)
   void UpdateSmoothnessTakesPriority(bool prefer_smoothness) override;
 
  protected:
   void ShortcutSwapAck(uint32 output_surface_id,
                        scoped_ptr<cc::GLFrameData> gl_frame_data);
   virtual void OnSwapAck(uint32 output_surface_id,
@@ skipping 43 matching lines @@
 
   // 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_