Added GPU process "echo" IPC message.

content/common/gpu/gpu_command_buffer_stub.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_COMMAND_BUFFER_STUB_H_
 #define CONTENT_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_
 #pragma once
 
 #if defined(ENABLE_GPU)
 
@@ skipping 84 matching lines @@
                     IPC::Message* reply_message);
   void OnSetParent(int32 parent_route_id,
                    uint32 parent_texture_id,
                    IPC::Message* reply_message);
   void OnGetState(IPC::Message* reply_message);
   void OnFlush(int32 put_offset,
                int32 last_known_get,
                uint32 flush_count,
                IPC::Message* reply_message);
   void OnAsyncFlush(int32 put_offset, uint32 flush_count);
+  void OnEcho(const IPC::Message& message);
   void OnRescheduled();
   void OnCreateTransferBuffer(int32 size,
                               int32 id_request,
                               IPC::Message* reply_message);
   void OnRegisterTransferBuffer(base::SharedMemoryHandle transfer_buffer,
                                 size_t size,
                                 int32 id_request,
                                 IPC::Message* reply_message);
   void OnDestroyTransferBuffer(int32 id, IPC::Message* reply_message);
   void OnGetTransferBuffer(int32 id, IPC::Message* reply_message);
 
   void OnCreateVideoDecoder(const std::vector<int32>& configs,
                             IPC::Message* reply_message);
   void OnDestroyVideoDecoder(int32 decoder_route_id);
 
+#if defined(OS_MACOSX)
   void OnSwapBuffers();
+#endif
+
   void OnCommandProcessed();
   void OnParseError();
 
   void OnResize(gfx::Size size);
   void ReportState();
 
   // The lifetime of objects of this class is managed by a GpuChannel. The
   // GpuChannels destroy all the GpuCommandBufferStubs that they own when they
   // are destroyed. So a raw pointer is safe.
   GpuChannel* channel_;
@@ skipping 29 matching lines @@
   // Zero or more video decoders owned by this stub, keyed by their
   // decoder_route_id.
   IDMap<GpuVideoDecodeAccelerator, IDMapOwnPointer> video_decoders_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuCommandBufferStub);
 };
 
 #endif  // defined(ENABLE_GPU)
 
 #endif  // CONTENT_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_