Use gpu::Mailbox in IPCs instead of std::string

content/browser/gpu/gpu_process_host_ui_shim.cc

 // 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.
 
 #include "content/browser/gpu/gpu_process_host_ui_shim.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 303 matching lines @@
   TRACE_EVENT0("renderer",
       "GpuProcessHostUIShim::OnAcceleratedSurfaceBuffersSwapped");
   AcceleratedSurfaceMsg_BufferPresented_Params ack_params;
   ack_params.mailbox_name = params.mailbox_name;
   ack_params.sync_point = 0;
   ScopedSendOnIOThread delayed_send(
       host_id_,
       new AcceleratedSurfaceMsg_BufferPresented(params.route_id,
                                                 ack_params));
 
-  if (!params.mailbox_name.empty() &&
-      params.mailbox_name.length() != GL_MAILBOX_SIZE_CHROMIUM)
-    return;
-
   RenderWidgetHostViewPort* view = GetRenderWidgetHostViewFromSurfaceID(
       params.surface_id);
   if (!view)
     return;
 
   delayed_send.Cancel();
 
   static const base::TimeDelta swap_delay = GetSwapDelay();
   if (swap_delay.ToInternalValue())
     base::PlatformThread::Sleep(swap_delay);
 
   // View must send ACK message after next composite.
   view->AcceleratedSurfaceBuffersSwapped(params, host_id_);
 }
 
 void GpuProcessHostUIShim::OnAcceleratedSurfacePostSubBuffer(
     const GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params& params) {
   TRACE_EVENT0("renderer",
       "GpuProcessHostUIShim::OnAcceleratedSurfacePostSubBuffer");
 
   AcceleratedSurfaceMsg_BufferPresented_Params ack_params;
   ack_params.mailbox_name = params.mailbox_name;
   ack_params.sync_point = 0;
    ScopedSendOnIOThread delayed_send(
       host_id_,
       new AcceleratedSurfaceMsg_BufferPresented(params.route_id,
                                                 ack_params));
 
-  if (!params.mailbox_name.empty() &&
-      params.mailbox_name.length() != GL_MAILBOX_SIZE_CHROMIUM)
-    return;
-
   RenderWidgetHostViewPort* view =
       GetRenderWidgetHostViewFromSurfaceID(params.surface_id);
   if (!view)
     return;
 
   delayed_send.Cancel();
 
   // View must send ACK message after next composite.
   view->AcceleratedSurfacePostSubBuffer(params, host_id_);
 }
@@ skipping 19 matching lines @@
   view->AcceleratedSurfaceRelease();
 }
 
 void GpuProcessHostUIShim::OnVideoMemoryUsageStatsReceived(
     const GPUVideoMemoryUsageStats& video_memory_usage_stats) {
   GpuDataManagerImpl::GetInstance()->UpdateVideoMemoryUsageStats(
       video_memory_usage_stats);
 }
 
 }  // namespace content