Add reference-counting for mailbox textures.

content/browser/renderer_host/render_widget_host_view_aura.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/renderer_host/render_widget_host_view_aura.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 1545 matching lines @@
       on_compositing_did_commit_callbacks_.push_back(
           base::Bind(&RenderWidgetHostViewAura::
                      SetSurfaceNotInUseByCompositor,
                      AsWeakPtr(),
                      current_surface_));  // Hold a ref so the texture will not
                                           // get deleted until after commit.
       if (!compositor->HasObserver(this))
         compositor->AddObserver(this);
     }
     current_surface_ = NULL;
+    LOG(INFO) << "Releasing frontbuffer";
     UpdateExternalTexture();
   }
 }
 
 bool RenderWidgetHostViewAura::HasAcceleratedSurface(
       const gfx::Size& desired_size) {
   // Aura doesn't use GetBackingStore for accelerated pages, so it doesn't
   // matter what is returned here as GetBackingStore is the only caller of this
   // method. TODO(jbates) implement this if other Aura code needs it.
   return false;
@@ skipping 886 matching lines @@
   UpdateExternalTexture();
   locks_pending_commit_.clear();
 
   // Make sure all ImageTransportClients are deleted now that the context those
   // are using is becoming invalid. This sends pending ACKs and needs to happen
   // after calling UpdateExternalTexture() which syncs with the impl thread.
   RunCompositingDidCommitCallbacks();
 
   DCHECK(!shared_surface_handle_.is_null());
   ImageTransportFactory* factory = ImageTransportFactory::GetInstance();
-  factory->DestroySharedSurfaceHandle(shared_surface_handle_);
+  factory->DestroySharedSurfaceHandle(shared_surface_handle_,
+                                      host_->surface_id());
   shared_surface_handle_ = factory->CreateSharedSurfaceHandle();
   host_->CompositingSurfaceUpdated();
   host_->ScheduleComposite();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewAura, private:
 
 RenderWidgetHostViewAura::~RenderWidgetHostViewAura() {
   if (paint_observer_)
     paint_observer_->OnViewDestroyed();
   if (!shared_surface_handle_.is_null()) {
     ImageTransportFactory* factory = ImageTransportFactory::GetInstance();
-    factory->DestroySharedSurfaceHandle(shared_surface_handle_);
+    factory->DestroySharedSurfaceHandle(shared_surface_handle_,
+                                        host_->surface_id());
     factory->RemoveObserver(this);
   }
   window_observer_.reset();
 #if defined(OS_WIN)
   transient_observer_.reset();
 #endif
   if (window_->GetRootWindow())
     window_->GetRootWindow()->RemoveRootWindowObserver(this);
   UnlockMouse();
   if (popup_type_ != WebKit::WebPopupTypeNone && popup_parent_host_view_) {
@@ skipping 178 matching lines @@
     RenderWidgetHost* widget) {
   return new RenderWidgetHostViewAura(widget);
 }
 
 // static
 void RenderWidgetHostViewPort::GetDefaultScreenInfo(WebScreenInfo* results) {
   GetScreenInfoForWindow(results, NULL);
 }
 
 }  // namespace content