Implement GpuArcVideoService for arc video accelerator

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 ecb19796f6fc9dfea6abdfe37ee61738104eeae6..ff3b099d24bb1fefe6f05aa80b46a7c212a06d84 100644
--- a/content/common/gpu/gpu_messages.h
+++ b/content/common/gpu/gpu_messages.h
@@ -821,3 +821,39 @@ IPC_MESSAGE_ROUTED0(AcceleratedJpegDecoderMsg_Destroy)
 IPC_MESSAGE_ROUTED2(AcceleratedJpegDecoderHostMsg_DecodeAck,
                     int32, /* bitstream_buffer_id */
                     media::JpegDecodeAccelerator::Error /* error */)
+
+IPC_MESSAGE_CONTROL1(GpuMsg_CreateArcAccelerator, int32_t /* device_type */)
+IPC_MESSAGE_CONTROL0(GpuMsg_ShutdownArcAccelerators)
+IPC_MESSAGE_CONTROL2(GpuHostMsg_ArcAcceleratorCreated,
+                     IPC::ChannelHandle /* handle to channel */,
+                     uint32_t /* initialization status */)
+
+// TODO(kcwu) create a new gpu_arc_messages.h ?
+IPC_SYNC_MESSAGE_CONTROL5_1(ArcAcceleratorMsg_BindSharedBuffer,
+                            uint32_t /* port */,
+                            size_t /* index */,
+                            base::FileDescriptor /* ashmem fd */,
+                            size_t /* offset */,
+                            size_t /* length */,
+                            uint32_t /* result */)
+IPC_SYNC_MESSAGE_CONTROL3_1(ArcAcceleratorMsg_BindGraphicBuffer,
+                            uint32_t /* port */,
+                            size_t /* index */,
+                            base::FileDescriptor /* dmabuf fd */,
+                            uint32_t /* result */)
+IPC_SYNC_MESSAGE_CONTROL2_1(ArcAcceleratorMsg_UseBuffer,
+                            uint32_t /* port */,
+                            size_t /* index */,
+                            uint32_t /* result */)
+IPC_SYNC_MESSAGE_CONTROL2_2(ArcAcceleratorMsg_SetBufferCount,
+                            uint32_t /* port */,
+                            size_t /* in_count */,
+                            size_t /* out_count */,
+                            size_t /* result */)
+IPC_SYNC_MESSAGE_CONTROL0_0(ArcAcceleratorMsg_Reset)
+IPC_SYNC_MESSAGE_CONTROL4_1(ArcAcceleratorMsg_SetPixelFormat,
+                            uint32_t /* port */,
+                            uint32_t /* pixel_format */,
+                            uint32_t /* image_size */,
+                            uint32_t /* memory_type */,
+                            uint32_t /* result */)