cc: Allow pepper to avoid DCHECK but reuse gpu::Mailbox.

content/renderer/pepper/pepper_plugin_instance_impl.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/renderer/pepper/pepper_plugin_instance_impl.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 707 matching lines @@
       container_->scrollRect(dx, dy, rect);
     } else {
       // Can't do optimized scrolling since there could be other elements on top
       // of us or the view renders via the accelerated compositor which is
       // incompatible with the move and backfill scrolling model.
       InvalidateRect(rect);
     }
   }
 }
 
-static void IgnoreCallback(uint32, bool) {}
-
 void PepperPluginInstanceImpl::CommitBackingTexture() {
   if (!texture_layer_.get())
     return;
   PlatformContext3D* context = bound_graphics_3d_->platform_context();
   gpu::Mailbox mailbox;
   uint32 sync_point = 0;
   context->GetBackingMailbox(&mailbox, &sync_point);
   DCHECK(!mailbox.IsZero());
   DCHECK_NE(sync_point, 0u);
-  texture_layer_->SetTextureMailbox(
-      cc::TextureMailbox(mailbox, GL_TEXTURE_2D, sync_point),
-      cc::SingleReleaseCallback::Create(base::Bind(&IgnoreCallback)));
+  texture_layer_->SetTextureMailboxWithoutReleaseCallback(
+      cc::TextureMailbox(mailbox, GL_TEXTURE_2D, sync_point));
   texture_layer_->SetNeedsDisplay();
 }
 
 void PepperPluginInstanceImpl::InstanceCrashed() {
   // Force free all resources and vars.
   HostGlobals::Get()->InstanceCrashed(pp_instance());
 
   // Free any associated graphics.
   SetFullscreen(false);
   FlashSetFullscreen(false, false);
@@ skipping 1204 matching lines @@
       fullscreen_container_->SetLayer(NULL);
     web_layer_.reset();
     texture_layer_ = NULL;
   }
   if (want_layer) {
     bool opaque = false;
     if (want_3d_layer) {
       DCHECK(bound_graphics_3d_.get());
       texture_layer_ = cc::TextureLayer::CreateForMailbox(NULL);
       opaque = bound_graphics_3d_->IsOpaque();
-      texture_layer_->SetTextureMailbox(
-          cc::TextureMailbox(mailbox, GL_TEXTURE_2D, sync_point),
-          cc::SingleReleaseCallback::Create(base::Bind(&IgnoreCallback)));
+      texture_layer_->SetTextureMailboxWithoutReleaseCallback(
+          cc::TextureMailbox(mailbox, GL_TEXTURE_2D, sync_point));
     } else {
       DCHECK(bound_graphics_2d_platform_);
       texture_layer_ = cc::TextureLayer::CreateForMailbox(this);
       bound_graphics_2d_platform_->AttachedToNewLayer();
       opaque = bound_graphics_2d_platform_->IsAlwaysOpaque();
       texture_layer_->SetFlipped(false);
     }
     web_layer_.reset(new webkit::WebLayerImpl(texture_layer_));
     if (fullscreen_container_) {
       fullscreen_container_->SetLayer(web_layer_.get());
@@ skipping 1165 matching lines @@
     // Running out-of-process. Initiate an IPC call to notify the plugin
     // process.
     ppapi::proxy::HostDispatcher* dispatcher =
         ppapi::proxy::HostDispatcher::GetForInstance(pp_instance());
     dispatcher->Send(new PpapiMsg_PPPInstance_HandleDocumentLoad(
         ppapi::API_ID_PPP_INSTANCE, pp_instance(), pending_host_id, data));
   }
 }
 
 }  // namespace content