RendererGLContext supports reparenting a GL context.

content/common/gpu/gpu_channel.h

 // Copyright (c) 2011 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_COMMON_GPU_GPU_CHANNEL_H_
 #define CONTENT_COMMON_GPU_GPU_CHANNEL_H_
 #pragma once
 
 #include <set>
 #include <string>
@@ skipping 70 matching lines @@
   void CreateViewCommandBuffer(
       gfx::PluginWindowHandle window,
       int32 render_view_id,
       const GPUCreateCommandBufferConfig& init_params,
       int32* route_id);
 
   void ViewResized(int32 command_buffer_route_id);
 
   gfx::GLShareGroup* share_group() const { return share_group_.get(); }
 
+  GpuCommandBufferStub* LookupCommandBuffer(int32 route_id);
+
 #if defined(OS_MACOSX)
   virtual void AcceleratedSurfaceBuffersSwapped(
       int32 route_id, uint64 swap_buffers_count);
   void DestroyCommandBufferByViewId(int32 render_view_id);
 #endif
 
   void LoseAllContexts();
 
   // Look up a GLSurface by ID. In this case the ID is the IPC routing ID.
   virtual gfx::GLSurface* LookupSurface(int surface_id);
@@ skipping 11 matching lines @@
   void OnLatchCallback(int route_id, bool is_set_latch);
 
  private:
   bool OnControlMessageReceived(const IPC::Message& msg);
 
   int GenerateRouteID();
 
   // Message handlers.
   void OnInitialize(base::ProcessHandle renderer_process);
   void OnCreateOffscreenCommandBuffer(
-      int32 parent_route_id,
       const gfx::Size& size,
       const GPUCreateCommandBufferConfig& init_params,
-      uint32 parent_texture_id,
       int32* route_id);
   void OnDestroyCommandBuffer(int32 route_id);
 
   void OnCreateOffscreenSurface(const gfx::Size& size,
                                 int* route_id);
   void OnDestroySurface(int route_id);
 
   void OnCreateVideoDecoder(int32 decoder_host_id,
                             uint32 command_buffer_route_id,
                             const std::vector<uint32>& configs);
@@ skipping 43 matching lines @@
   TransportTextureMap transport_textures_;
 
   bool log_messages_;  // True if we should log sent and received messages.
   gpu::gles2::DisallowedExtensions disallowed_extensions_;
   GpuWatchdog* watchdog_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannel);
 };
 
 #endif  // CONTENT_COMMON_GPU_GPU_CHANNEL_H_