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

content/port/browser/render_widget_host_view_port.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_PORT_BROWSER_RENDER_WIDGET_HOST_VIEW_PORT_H_
 #define CONTENT_PORT_BROWSER_RENDER_WIDGET_HOST_VIEW_PORT_H_
 #pragma once
 
 #include "base/callback.h"
 #include "base/process_util.h"
@@ skipping 206 matching lines @@
       TransportDIB::Handle transport_dib) = 0;
 #endif
 
 #if defined(USE_AURA)
   virtual void AcceleratedSurfaceNew(
       int32 width,
       int32 height,
       uint64* surface_id,
       TransportDIB::Handle* surface_handle) = 0;
   virtual void AcceleratedSurfaceRelease(uint64 surface_id) = 0;
+  virtual void AcceleratedSurfaceSuggestDiscard(uint64 surface_id,
+                                                int32 route_id,
+                                                int gpu_host_id) = 0;
 #endif
 
 #if defined(TOOLKIT_GTK)
   virtual void CreatePluginContainer(gfx::PluginWindowHandle id) = 0;
   virtual void DestroyPluginContainer(gfx::PluginWindowHandle id) = 0;
 #endif  // defined(TOOLKIT_GTK)
 
 #if defined(OS_WIN) && !defined(USE_AURA)
   virtual void WillWmDestroy() = 0;
 #endif
@@ skipping 27 matching lines @@
   virtual BrowserAccessibilityManager*
       GetBrowserAccessibilityManager() const = 0;
   virtual void OnAccessibilityNotifications(
       const std::vector<AccessibilityHostMsg_NotificationParams>& params) {
   }
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PORT_BROWSER_RENDER_WIDGET_HOST_VIEW_PORT_H_