Remove CommandBuffer::GetTransferBuffer.

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 <string>
 #include <vector>
 
@@ skipping 542 matching lines @@
 // used to identify the transfer buffer from a command buffer.
 IPC_MESSAGE_ROUTED3(GpuCommandBufferMsg_RegisterTransferBuffer,
                     int32 /* id */,
                     base::SharedMemoryHandle /* transfer_buffer */,
                     uint32 /* size */)
 
 // Destroy a previously created transfer buffer.
 IPC_MESSAGE_ROUTED1(GpuCommandBufferMsg_DestroyTransferBuffer,
                     int32 /* id */)
 
-// Get the shared memory handle for a transfer buffer mapped to the callers
-// process.
-IPC_SYNC_MESSAGE_ROUTED1_2(GpuCommandBufferMsg_GetTransferBuffer,
-                           int32 /* id */,
-                           base::SharedMemoryHandle /* transfer_buffer */,
-                           uint32 /* size */)
-
 // Create and initialize a hardware video decoder, returning its new route_id.
 // Created decoders should be freed with AcceleratedVideoDecoderMsg_Destroy when
 // no longer needed.
 IPC_SYNC_MESSAGE_ROUTED1_1(GpuCommandBufferMsg_CreateVideoDecoder,
                            media::VideoCodecProfile /* profile */,
                            int /* route_id */)
 
 // Tells the proxy that there was an error and the command buffer had to be
 // destroyed for some reason.
 IPC_MESSAGE_ROUTED1(GpuCommandBufferMsg_Destroyed,
@@ skipping 192 matching lines @@
 
 // Notify the renderer that an output buffer has been filled with encoded data.
 IPC_MESSAGE_ROUTED3(AcceleratedVideoEncoderHostMsg_BitstreamBufferReady,
                     int32 /* bitstream_buffer_id */,
                     uint32 /* payload_size */,
                     bool /* key_frame */)
 
 // Report error condition.
 IPC_MESSAGE_ROUTED1(AcceleratedVideoEncoderHostMsg_NotifyError,
                     media::VideoEncodeAccelerator::Error /* error */)