content: Add DeletedGpuMemoryBuffer IPC.

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 614 matching lines @@
 
 // Register an existing gpu memory buffer. The id that can be
 // used to identify the gpu memory buffer from a command buffer.
 IPC_MESSAGE_ROUTED5(GpuCommandBufferMsg_RegisterGpuMemoryBuffer,
                     int32 /* id */,
                     gfx::GpuMemoryBufferHandle /* gpu_memory_buffer */,
                     uint32 /* width */,
                     uint32 /* height */,
                     uint32 /* internalformat */)
 
-// Destroy a previously created gpu memory buffer.
-IPC_MESSAGE_ROUTED1(GpuCommandBufferMsg_DestroyGpuMemoryBuffer,
+// Unregister a previously registered gpu memory buffer.
+IPC_MESSAGE_ROUTED1(GpuCommandBufferMsg_UnregisterGpuMemoryBuffer,
                     int32 /* id */)
 
 // Attaches an external image stream to the client texture.
 IPC_SYNC_MESSAGE_ROUTED2_1(GpuCommandBufferMsg_CreateStreamTexture,
                            uint32, /* client_texture_id */
                            int32, /* stream_id */
                            bool /* succeeded */)
 
 //------------------------------------------------------------------------------
 // Accelerated Video Decoder Messages
@@ skipping 108 matching lines @@
                     int32 /* bitstream_buffer_id */,
                     uint32 /* payload_size */,
                     bool /* key_frame */)
 
 // Report error condition.
 IPC_MESSAGE_ROUTED1(AcceleratedVideoEncoderHostMsg_NotifyError,
                     media::VideoEncodeAccelerator::Error /* error */)
 
 // Send destroy request to the encoder.
 IPC_MESSAGE_ROUTED0(AcceleratedVideoEncoderMsg_Destroy)