Make Mac swap code like other platforms

content/browser/compositor/offscreen_browser_compositor_output_surface.h

Index: content/browser/compositor/offscreen_browser_compositor_output_surface.h
diff --git a/content/browser/compositor/offscreen_browser_compositor_output_surface.h b/content/browser/compositor/offscreen_browser_compositor_output_surface.h
index 08971c23efab1f17022842dbf337963be4c0a4fc..b2c497432fc588ab3839d4c5f48174fc5874421d 100644
--- a/content/browser/compositor/offscreen_browser_compositor_output_surface.h
+++ b/content/browser/compositor/offscreen_browser_compositor_output_surface.h
@@ -49,7 +49,8 @@ class OffscreenBrowserCompositorOutputSurface
   base::Closure CreateCompositionStartedCallback() override;
   void OnGpuSwapBuffersCompleted(
       const std::vector<ui::LatencyInfo>& latency_info,
-      gfx::SwapResult result) override{};
+      gfx::SwapResult result,
+      const gpu::GpuProcessHostedCALayerTreeParamsMac* params_mac) override{};
 #if defined(OS_MACOSX)
   void SetSurfaceSuspendedForRecycle(bool suspended) override {};
   bool SurfaceShouldNotShowFramesAfterSuspendForRecycle() const override;