Replace context parenting by sharing through mailboxes

content/common/gpu/gpu_command_buffer_stub.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_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_
 #define CONTENT_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_
 
 #include <deque>
 #include <string>
 #include <vector>
@@ skipping 14 matching lines @@
 #include "ipc/ipc_sender.h"
 #include "media/base/video_decoder_config.h"
 #include "ui/base/latency_info.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/size.h"
 #include "ui/gl/gl_surface.h"
 #include "ui/gl/gpu_preference.h"
 #include "ui/surface/transport_dib.h"
 
 namespace gpu {
+struct Mailbox;
 namespace gles2 {
 class ImageManager;
 class MailboxManager;
 }
 }
 
 namespace content {
 
 class GpuChannel;
 class GpuVideoDecodeAccelerator;
@@ skipping 97 matching lines @@
   bool MakeCurrent();
   void Destroy();
 
   // Cleans up and sends reply if OnInitialize failed.
   void OnInitializeFailed(IPC::Message* reply_message);
 
   // Message handlers:
   void OnInitialize(base::SharedMemoryHandle shared_state_shm,
                     IPC::Message* reply_message);
   void OnSetGetBuffer(int32 shm_id, IPC::Message* reply_message);
-  void OnSetParent(int32 parent_route_id,
-                   uint32 parent_texture_id,
-                   IPC::Message* reply_message);
+  void OnProduceFrontBuffer(const gpu::Mailbox& mailbox);
   void OnGetState(IPC::Message* reply_message);
   void OnGetStateFast(IPC::Message* reply_message);
   void OnAsyncFlush(int32 put_offset, uint32 flush_count);
   void OnEcho(const IPC::Message& message);
   void OnRescheduled();
   void OnRegisterTransferBuffer(int32 id,
                                 base::SharedMemoryHandle transfer_buffer,
                                 uint32 size);
   void OnDestroyTransferBuffer(int32 id);
   void OnGetTransferBuffer(int32 id, IPC::Message* reply_message);
@@ skipping 84 matching lines @@
   size_t active_url_hash_;
 
   size_t total_gpu_memory_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuCommandBufferStub);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_