Call DidPostSwapBuffers and SwapBuffersComplete for browser software surface

content/browser/compositor/gpu_browser_compositor_output_surface.h

Index: content/browser/compositor/gpu_browser_compositor_output_surface.h
diff --git a/content/browser/compositor/gpu_browser_compositor_output_surface.h b/content/browser/compositor/gpu_browser_compositor_output_surface.h
index 5f47a30d230bd5d39589fa88f18d9c54ba7fe760..b5ee21f1586be4859eea48a3435ab421be8eb85f 100644
--- a/content/browser/compositor/gpu_browser_compositor_output_surface.h
+++ b/content/browser/compositor/gpu_browser_compositor_output_surface.h
@@ -35,6 +35,11 @@ class GpuBrowserCompositorOutputSurface
  protected:
   // cc::OutputSurface implementation.
   virtual void SwapBuffers(cc::CompositorFrame* frame) override;
+  virtual void OnSwapBuffersComplete() override;
+
+#if defined(OS_MACOSX)
+  virtual void OnSurfaceDisplayed() override;
+#endif
 
   DISALLOW_COPY_AND_ASSIGN(GpuBrowserCompositorOutputSurface);
 };