Sample code: IPC Transport object for GPU

content/common/gpu/client/ipc/chrome/chrome_command_buffer_ipc_transport.h

Index: content/common/gpu/client/ipc/chrome/chrome_command_buffer_ipc_transport.h
diff --git a/content/common/gpu/client/ipc/chrome/chrome_command_buffer_ipc_transport.h b/content/common/gpu/client/ipc/chrome/chrome_command_buffer_ipc_transport.h
new file mode 100644
index 0000000000000000000000000000000000000000..a39c52b2d28f77c5cff3a5e2e499229e16ae92ed
--- /dev/null
+++ b/content/common/gpu/client/ipc/chrome/chrome_command_buffer_ipc_transport.h
@@ -0,0 +1,108 @@
+// Copyright 2015 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_CLIENT_IPC_CHROME_CHROME_COMMAND_BUFFER_IPC_TRANSPORT_H_
+#define CONTENT_COMMON_GPU_CLIENT_IPC_CHROME_CHROME_COMMAND_BUFFER_IPC_TRANSPORT_H_
+
+#include "content/common/gpu/client/ipc/command_buffer_ipc_transport.h"
+
+#include "ipc/ipc_listener.h"
+
+namespace IPC {
+class Message;
+}
+
+namespace content {
+
+class ChromeGpuChannelHostIPCTransport;
+class GpuChannelHost;
+
+class ChromeCommandBufferIPCTransport : public IPC::Listener,
+                                        public CommandBufferIPCTransport {
+ public:
+  static scoped_ptr<CommandBufferIPCTransport> Create();
+
+  ~ChromeCommandBufferIPCTransport() override;
+
+  base::WeakPtr<ChromeCommandBufferIPCTransport> AsWeakPtr();
+
+  int32_t route_id() const { return route_id_; }
+
+  void BindToService(ChromeGpuChannelHostIPCTransport* channel_transport);
+
+  // IPC::Listener implementation:
+  bool OnMessageReceived(const IPC::Message& message) override;
+  void OnChannelError() override;
+
+  // CommandBufferIPCTransport implementation.
+  scoped_ptr<base::SharedMemory> AllocateSharedMemory(size_t size) override;
+  bool CreateImage(const CreateImageParams& params) override;
+  bool CreateStreamTexture(uint32_t client_texture_id,
+                           int32_t* stream_id,
+                           bool* succeeded) override;
+  bool CreateVideoDecoder(GpuVideoDecodeAcceleratorHostIPCTransport* transport,
+                          const media::VideoDecodeAccelerator::Config& config,
+                          bool* succeeded) override;
+  bool CreateVideoEncoder(GpuVideoEncodeAcceleratorHostIPCTransport* transport,
+                          media::VideoPixelFormat input_format,
+                          const gfx::Size& input_visible_size,
+                          media::VideoCodecProfile output_profile,
+                          uint32_t initial_bitrate,
+                          bool* succeeded) override;
+  bool DestroyImage(int32_t id) override;
+  bool DestroyTransferBuffer(int32_t id) override;
+  uint64_t GetCommandBufferID() const override;
+  int32_t GetShareGroupID() const override;
+  bool Initialize(base::SharedMemoryHandle shared_state_handle,
+                  bool* result,
+                  gpu::Capabilities* capabilities) override;
+  bool ProduceFrontBuffer(const gpu::Mailbox& mailbox) override;
+  bool RegisterTransferBuffer(int32_t id,
+                              base::SharedMemoryHandle transfer_buffer,
+                              uint32_t size) override;
+  bool SetGetBuffer(int32_t shm_id) override;
+  void SetClient(CommandBufferIPCTransport::Client* client) override;
+  bool SignalQuery(uint32_t query, uint32_t signal_id) override;
+  bool SignalSyncToken(const gpu::SyncToken& sync_token,
+                       uint32_t signal_id) override;
+  bool WaitForGetOffsetInRange(int32_t start,
+                               int32_t end,
+                               gpu::CommandBuffer::State* state) override;
+  bool WaitForTokenInRange(int32_t start,
+                           int32_t end,
+                           gpu::CommandBuffer::State* state) override;
+
+ private:
+  ChromeCommandBufferIPCTransport();
+
+  void InvalidGpuMessage();
+
+  // Send an IPC message over the GPU channel. This is private to fully
+  // encapsulate the channel; all callers of this function must explicitly
+  // verify that the context has not been lost.
+  bool Send(IPC::Message* msg);
+
+  // Message handlers:
+  void OnConsoleMessage(const CommandBufferConsoleMessage& message);
+  void OnDestroyed(gpu::error::ContextLostReason reason,
+                   gpu::error::Error error);
+  void OnSignalAck(uint32_t id);
+  void OnSwapBuffersCompleted(const std::vector<ui::LatencyInfo>& latency_info,
+                              gfx::SwapResult result);
+  void OnUpdateState(const gpu::CommandBuffer::State& state);
+  void OnUpdateVSyncParameters(base::TimeTicks timebase,
+                               base::TimeDelta interval);
+
+  ChromeGpuChannelHostIPCTransport* channel_transport_;
+  uint64_t command_buffer_id_;
+  int route_id_;
+  CommandBufferIPCTransport::Client* client_;
+  base::WeakPtrFactory<ChromeCommandBufferIPCTransport> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(ChromeCommandBufferIPCTransport);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_GPU_CLIENT_IPC_CHROME_CHROME_COMMAND_BUFFER_IPC_TRANSPORT_H_