Revert "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 634316e2d026a98f14bbdbf6aecae16e79f9093e..832ad001d47f5a40f301a22dcfd8148c63243a88 100644
--- a/content/common/gpu/gpu_messages.h
+++ b/content/common/gpu/gpu_messages.h
@@ -833,26 +833,3 @@ IPC_MESSAGE_ROUTED0(AcceleratedJpegDecoderMsg_Destroy)
 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