Clean up Mac swap acknowledgement code

content/browser/compositor/software_browser_compositor_output_surface.h

 // Copyright 2014 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_COMPOSITOR_SOFTWARE_BROWSER_COMPOSITOR_OUTPUT_SURFACE_H_
 #define CONTENT_BROWSER_COMPOSITOR_SOFTWARE_BROWSER_COMPOSITOR_OUTPUT_SURFACE_H_
 
 #include "base/memory/weak_ptr.h"
 #include "content/browser/compositor/browser_compositor_output_surface.h"
 #include "content/common/content_export.h"
@@ skipping 12 matching lines @@
     : public BrowserCompositorOutputSurface {
  public:
   SoftwareBrowserCompositorOutputSurface(
       scoped_ptr<cc::SoftwareOutputDevice> software_device,
       const scoped_refptr<ui::CompositorVSyncManager>& vsync_manager);
 
   ~SoftwareBrowserCompositorOutputSurface() override;
 
  private:
   void SwapBuffers(cc::CompositorFrame* frame) override;
+  void OnGpuSwapBuffersCompleted(
+      const std::vector<ui::LatencyInfo>& latency_info,
+      gfx::SwapResult result) override;
 
 #if defined(OS_MACOSX)
-  void OnSurfaceDisplayed() override;
   void SetSurfaceSuspendedForRecycle(bool suspended) override;
   bool SurfaceShouldNotShowFramesAfterSuspendForRecycle() const override;
 #endif
 
   base::WeakPtrFactory<SoftwareBrowserCompositorOutputSurface> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SoftwareBrowserCompositorOutputSurface);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_COMPOSITOR_SOFTWARE_BROWSER_COMPOSITOR_OUTPUT_SURFACE_H_