Drop frontbuffers with ui-use-gpu-process, synchronized with browser, decoupled from backbuffer dro…

content/browser/renderer_host/render_widget_host_impl.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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 #pragma once
 
 #include <deque>
 #include <string>
@@ skipping 128 matching lines @@
   // IPC::Channel::Listener
   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
 
   // Sends a message to the corresponding object in the renderer.
   virtual bool Send(IPC::Message* msg) OVERRIDE;
 
   // Called to notify the RenderWidget that it has been hidden or restored from
   // having been hidden.
   void WasHidden();
   void WasRestored();
+  bool IsVisible() const { return !is_hidden_; }
 
   // Called to notify the RenderWidget that its associated native window got
   // focused.
   virtual void GotFocus();
 
   // Tells the renderer it got/lost focus.
   void Focus();
   virtual void LostCapture();
 
   // Sets whether the renderer should show controls in an active state.  On all
@@ skipping 541 matching lines @@
   base::WeakPtrFactory<RenderWidgetHostImpl> weak_factory_;
 
   scoped_ptr<TapSuppressionController> tap_suppression_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_