Call DidPostSwapBuffers and SwapBuffersComplete for browser software surface

content/browser/compositor/gpu_browser_compositor_output_surface.cc

 // 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.
 
 #include "content/browser/compositor/gpu_browser_compositor_output_surface.h"
 
 #include "cc/output/compositor_frame.h"
 #include "content/browser/compositor/reflector_impl.h"
 #include "content/common/gpu/client/context_provider_command_buffer.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
@@ skipping 30 matching lines @@
     if (frame->gl_frame_data->sub_buffer_rect ==
         gfx::Rect(frame->gl_frame_data->size))
       reflector_->OnSwapBuffers();
     else
       reflector_->OnPostSubBuffer(frame->gl_frame_data->sub_buffer_rect);
   }
 
   OutputSurface::SwapBuffers(frame);
 }
 
+void GpuBrowserCompositorOutputSurface::OnSwapBuffersComplete() {
+  // On Mac, delay acknowledging the swap to the output surface client until
+  // it has been drawn.
+#if !defined(OS_MACOSX)
+  cc::OutputSurface::OnSwapBuffersComplete();
+#endif
+}
+
+#if defined(OS_MACOSX)
+void GpuBrowserCompositorOutputSurface::OnSurfaceDisplayed() {
+  cc::OutputSurface::OnSwapBuffersComplete();
+}
+#endif
+
 }  // namespace content