Mac: Fix bad framerate when capturing tab

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_
 
 #import <Cocoa/Cocoa.h>
 #include <IOSurface/IOSurfaceAPI.h>
 #include <list>
@@ skipping 332 matching lines @@
   virtual bool Send(IPC::Message* message) OVERRIDE;
 
   // SoftwareFrameManagerClient implementation:
   virtual void SoftwareFrameWasFreed(
       uint32 output_surface_id, unsigned frame_id) OVERRIDE;
   virtual void ReleaseReferencesToSoftwareFrame() OVERRIDE;
 
   virtual SkColorType PreferredReadbackFormat() OVERRIDE;
 
   // CompositingIOSurfaceLayerClient implementation.
+  virtual bool AcceleratedLayerShouldAckImmediately() const OVERRIDE;
   virtual void AcceleratedLayerDidDrawFrame(bool succeeded) OVERRIDE;
 
   // gfx::DisplayObserver implementation.
   virtual void OnDisplayAdded(const gfx::Display& new_display) OVERRIDE;
   virtual void OnDisplayRemoved(const gfx::Display& old_display) OVERRIDE;
   virtual void OnDisplayMetricsChanged(const gfx::Display& display,
                                        uint32_t metrics) OVERRIDE;
 
   // Forwards the mouse event to the renderer.
   void ForwardMouseEvent(const blink::WebMouseEvent& event);
@@ skipping 150 matching lines @@
       const gfx::Rect& damage_rect_in_dip) OVERRIDE;
   virtual bool IsVisible() OVERRIDE;
   virtual scoped_ptr<ResizeLock> CreateResizeLock(
       bool defer_compositor_lock) OVERRIDE;
   virtual gfx::Size DesiredFrameSize() OVERRIDE;
   virtual float CurrentDeviceScaleFactor() OVERRIDE;
   virtual gfx::Size ConvertViewSizeToPixel(const gfx::Size& size) OVERRIDE;
   virtual DelegatedFrameHost* GetDelegatedFrameHost() const OVERRIDE;
 
   // BrowserCompositorViewMacClient implementation.
+  virtual bool BrowserCompositorViewShouldAckImmediately() const OVERRIDE;
   virtual void BrowserCompositorViewFrameSwapped(
       const std::vector<ui::LatencyInfo>& latency_info) OVERRIDE;
   virtual NSView* BrowserCompositorSuperview() OVERRIDE;
   virtual ui::Layer* BrowserCompositorRootLayer() OVERRIDE;
 
  private:
   friend class RenderWidgetHostViewMacTest;
 
   struct PendingSwapAck {
     PendingSwapAck(int32 route_id, int gpu_host_id, int32 renderer_id)
@@ skipping 92 matching lines @@
   scoped_ptr<RenderWidgetHostViewFrameSubscriber> frame_subscriber_;
 
   base::WeakPtrFactory<RenderWidgetHostViewMac>
       software_frame_weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewMac);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_