Delete background tab IOSurfaces on Mac.

content/browser/renderer_host/render_widget_host_view_mac.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_VIEW_MAC_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_
 #pragma once
 
 #import <Cocoa/Cocoa.h>
 #include <list>
@@ skipping 267 matching lines @@
       int32 width,
       int32 height,
       TransportDIB::Handle transport_dib) OVERRIDE;
   virtual void AcceleratedSurfaceBuffersSwapped(
       const GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params& params,
       int gpu_host_id) OVERRIDE;
   virtual void AcceleratedSurfacePostSubBuffer(
       const GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params& params,
       int gpu_host_id) OVERRIDE;
   virtual void AcceleratedSurfaceSuspend() OVERRIDE;
+  virtual bool HasAcceleratedSurface(const gfx::Size& desired_size) OVERRIDE;
   virtual void GetScreenInfo(WebKit::WebScreenInfo* results) OVERRIDE;
   virtual gfx::Rect GetRootWindowBounds() OVERRIDE;
   virtual gfx::GLSurfaceHandle GetCompositingSurface() OVERRIDE;
 
   void DrawAcceleratedSurfaceInstance(
       CGLContextObj context,
       gfx::PluginWindowHandle plugin_handle,
       NSSize size);
   // Forces the textures associated with any accelerated plugin instances
   // to be reloaded.
@@ skipping 16 matching lines @@
   void KillSelf();
 
   void SetTextInputActive(bool active);
 
   // Sends completed plugin IME notification and text back to the renderer.
   void PluginImeCompositionCompleted(const string16& text, int plugin_id);
 
   const std::string& selected_text() const { return selected_text_; }
 
   // Call setNeedsDisplay on the cocoa_view_. The IOSurface will be drawn during
-  // the next drawRect. The route_id and gpu_host_id are added to a list to be
-  // acked when the SwapBuffers occurs in drawRect.
-  void CompositorSwapBuffers(uint64 surface_handle,
-                             int32 route_id,
-                             int32 gpu_host_id);
-  // Ack pending SwapBuffers requests (queued up by CompositorSwapBuffers), if
-  // any, to unblock the GPU process. Has no effect if there are no pending
-  // requests.
-  void AckPendingCompositorSwapBuffers();
+  // the next drawRect.
+  void CompositorSwapBuffers(uint64 surface_handle);
 
   // These member variables should be private, but the associated ObjC class
   // needs access to them and can't be made a friend.
 
   // The associated Model.  Can be NULL if Destroy() is called when
   // someone (other than superview) has retained |cocoa_view_|.
   content::RenderWidgetHostImpl* render_widget_host_;
 
   // This is true when we are currently painting and thus should handle extra
   // paint requests by expanding the invalid rect rather than actually painting.
@@ skipping 48 matching lines @@
   // Returns whether this render view is a popup (autocomplete window).
   bool IsPopup() const;
 
   // Updates the display cursor if the current event is over the view's window.
   void UpdateCursorIfNecessary();
 
   // Shuts down the render_widget_host_.  This is a separate function so we can
   // invoke it from the message loop.
   void ShutdownHost();
 
+  // Called when a GPU SwapBuffers is received.
+  void GotAcceleratedFrame();
+  // Called when a software DIB is received.
+  void GotSoftwareFrame();
+
   // The associated view. This is weak and is inserted into the view hierarchy
   // to own this RenderWidgetHostViewMac object.
   RenderWidgetHostViewCocoa* cocoa_view_;
 
   // The cursor for the page. This is passed up from the renderer.
   WebCursor current_cursor_;
 
   // Indicates if the page is loading.
   bool is_loading_;
 
   // true if the View is not visible.
   bool is_hidden_;
 
   // The text to be shown in the tooltip, supplied by the renderer.
   string16 tooltip_text_;
 
   // Factory used to safely scope delayed calls to ShutdownHost().
   base::WeakPtrFactory<RenderWidgetHostViewMac> weak_factory_;
 
   // selected text on the renderer.
   std::string selected_text_;
 
-  gfx::PluginWindowHandle compositing_surface_;
-
-  // List of pending swaps for deferred acking:
-  //   pairs of (route_id, gpu_host_id).
-  std::list<std::pair<int32, int32> > pending_swap_buffers_acks_;
-
   // The fullscreen window used for pepper flash.
   scoped_nsobject<NSWindow> pepper_fullscreen_window_;
   scoped_nsobject<FullscreenWindowManager> fullscreen_window_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewMac);
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_