Implement GpuArcVideoService for arc video accelerator

content/common/gpu/gpu_messages.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.
 
 // Multiply-included message file, hence no include guard here, but see below
 // for a much smaller-than-usual include guard section.
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 829 matching lines @@
 IPC_MESSAGE_ROUTED0(AcceleratedJpegDecoderMsg_Destroy)
 
 //------------------------------------------------------------------------------
 // Accelerated JPEG Decoder Host Messages
 // These messages are sent from the GPU process to Browser process.
 //
 // Report decode status.
 IPC_MESSAGE_ROUTED2(AcceleratedJpegDecoderHostMsg_DecodeAck,
                     int32_t, /* bitstream_buffer_id */
                     media::JpegDecodeAccelerator::Error /* error */)
+
+#if defined(OS_CHROMEOS)
+//------------------------------------------------------------------------------
+// Arc Video Accelerator Messages
+// These messages are sent from the Browser process to GPU process.
+
+// Tells the GPU process to create a new channel for communication with
+// ArcVideoAccelerator. The channel is returned using
+// GpuHostMsg_ArcVideoAcceleratorChannelCreated message.
+IPC_MESSAGE_CONTROL0(GpuMsg_CreateArcVideoAcceleratorChannel)
+
+// Tells the GPU process to shutdown arc video service and terminate all
+// instances of ArcVideoAccelerator.
+IPC_MESSAGE_CONTROL0(GpuMsg_ShutdownArcVideoService)
+
+//------------------------------------------------------------------------------
+// Arc Video Accelerator Host Messages
+// These messages are sent from the GPU process to Browser process.
+
+// Response from GPU to a GpuMsg_CreateArcVideoAcceleratorChannel message.
+IPC_MESSAGE_CONTROL1(GpuHostMsg_ArcVideoAcceleratorChannelCreated,
+                     IPC::ChannelHandle /* handle to channel */)
+#endif