Add reference-counting for mailbox textures.

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 267 matching lines @@
 
 // Tells the GPU process to crash.
 IPC_MESSAGE_CONTROL0(GpuMsg_Crash)
 
 // Tells the GPU process to hang.
 IPC_MESSAGE_CONTROL0(GpuMsg_Hang)
 
 // Tells the GPU process to disable the watchdog thread.
 IPC_MESSAGE_CONTROL0(GpuMsg_DisableWatchdog)
 
+// Tells the GPU process that a surface is being deleted.
+IPC_MESSAGE_CONTROL3(GpuMsg_DestroySurface,
+                     int, /* client_id */
+                     int, /* route_id */
+                     int /* surface_id */)
+
 //------------------------------------------------------------------------------
 // GPU Host Messages
 // These are messages to the browser.
 
 // A renderer sends this when it wants to create a connection to the GPU
 // process. The browser will create the GPU process if necessary, and will
 // return a handle to the channel via a GpuChannelEstablished message.
 IPC_SYNC_MESSAGE_CONTROL1_3(GpuHostMsg_EstablishGpuChannel,
                             content::CauseForGpuLaunch,
                             int /* client id */,
@@ skipping 358 matching lines @@
 
 // Confirm decoder has been flushed.
 IPC_MESSAGE_ROUTED0(AcceleratedVideoDecoderHostMsg_FlushDone)
 
 // Confirm decoder has been reset.
 IPC_MESSAGE_ROUTED0(AcceleratedVideoDecoderHostMsg_ResetDone)
 
 // Video decoder has encountered an error.
 IPC_MESSAGE_ROUTED1(AcceleratedVideoDecoderHostMsg_ErrorNotification,
                     uint32) /* Error ID */