Add media::VideoEncodeAccelerator with WebRTC integration

content/common/gpu/gpu_messages.h

Index: content/common/gpu/gpu_messages.h
diff --git a/content/common/gpu/gpu_messages.h b/content/common/gpu/gpu_messages.h
index 92b73a9b077678451e96e06c1696e7b331485a27..ca6ef20e1a59570a530801be51ea204f424cf12e 100644
--- a/content/common/gpu/gpu_messages.h
+++ b/content/common/gpu/gpu_messages.h
@@ -23,7 +23,9 @@
 #include "gpu/ipc/gpu_command_buffer_traits.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_message_macros.h"
+#include "media/base/video_frame.h"
 #include "media/video/video_decode_accelerator.h"
+#include "media/video/video_encode_accelerator.h"
 #include "ui/base/latency_info.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/size.h"
@@ -216,6 +218,10 @@ IPC_STRUCT_TRAITS_BEGIN(content::GpuRenderingStats)
   IPC_STRUCT_TRAITS_MEMBER(total_processing_commands_time)
 IPC_STRUCT_TRAITS_END()
 
+IPC_ENUM_TRAITS(media::VideoFrame::Format)
+
+IPC_ENUM_TRAITS(media::VideoEncodeAccelerator::Error)
+
 //------------------------------------------------------------------------------
 // GPU Messages
 // These are messages from the browser to the GPU process.
@@ -446,6 +452,12 @@ IPC_MESSAGE_CONTROL1(GpuChannelMsg_GenerateMailboxNamesAsync,
 IPC_MESSAGE_CONTROL1(GpuChannelMsg_GenerateMailboxNamesReply,
                      std::vector<gpu::Mailbox> /* mailbox_names */)
 
+// Create a new GPU-accelerated video encoder.
+IPC_SYNC_MESSAGE_CONTROL0_1(GpuChannelMsg_CreateVideoEncoder,
+                            int32 /* route_id */)
+
+IPC_MESSAGE_CONTROL1(GpuChannelMsg_DestroyVideoEncoder, int32 /* route_id */)
+
 #if defined(OS_ANDROID)
 // Register the StreamTextureProxy class with the GPU process, so that
 // the renderer process will get notified whenever a frame becomes available.
@@ -689,3 +701,53 @@ IPC_MESSAGE_ROUTED0(AcceleratedVideoDecoderHostMsg_ResetDone)
 // Video decoder has encountered an error.
 IPC_MESSAGE_ROUTED1(AcceleratedVideoDecoderHostMsg_ErrorNotification,
                     uint32) /* Error ID */
+
+//------------------------------------------------------------------------------
+// Accelerated Video Encoder Messages
+// These messages are sent from the Renderer process to GPU process.
+
+// Initialize the accelerated encoder.
+IPC_MESSAGE_ROUTED4(AcceleratedVideoEncoderMsg_Initialize,
+                    media::VideoFrame::Format /* input_format */,
+                    gfx::Size /* input_resolution */,
+                    media::VideoCodecProfile /* output_profile */,
+                    int32 /* initial_bitrate */)
+
+// Queue a input buffer to the encoder to encode.
+IPC_MESSAGE_ROUTED4(AcceleratedVideoEncoderMsg_Encode,
+                    int32 /* buffer_id */,
+                    base::SharedMemoryHandle /* buffer_handle */,
+                    uint32 /* buffer_size */,
+                    bool /* force_keyframe */)
+
+// Queue a buffer to the encoder for use in returning output.
+IPC_MESSAGE_ROUTED3(AcceleratedVideoEncoderMsg_UseOutputBitstreamBuffer,
+                    int32 /* buffer_id */,
+                    base::SharedMemoryHandle /* buffer_handle */,
+                    uint32 /* buffer_size */)
+
+// Request a runtime encoding parameter change.
+IPC_MESSAGE_ROUTED1(AcceleratedVideoEncoderMsg_RequestEncodingParameterChange,
+                    int32 /* bitrate */)
+
+//------------------------------------------------------------------------------
+// Accelerated Video Encoder Host Messages
+// These messages are sent from GPU process to Renderer process.
+
+IPC_MESSAGE_ROUTED0(AcceleratedVideoEncoderHostMsg_NotifyInitializeDone)
+
+IPC_MESSAGE_ROUTED3(AcceleratedVideoEncoderHostMsg_RequireBitstreamBuffers,
+                    int /* input_count */,
+                    gfx::Size /* input_dimensions */,
+                    uint32 /* output_size */)
+
+IPC_MESSAGE_ROUTED1(AcceleratedVideoEncoderHostMsg_NotifyInputDone,
+                    int32 /* bitstream_buffer_id */)
+
+IPC_MESSAGE_ROUTED3(AcceleratedVideoEncoderHostMsg_BitstreamBufferReady,
+                    int32 /* bitstream_buffer_id */,
+                    uint32 /* payload_size */,
+                    bool /* key_frame */)
+
+IPC_MESSAGE_ROUTED1(AcceleratedVideoEncoderHostMsg_NotifyError,
+                    media::VideoEncodeAccelerator::Error /* error */)