Mac ÜC: Enable GPU back-pressure from the browser to the renderer

content/browser/renderer_host/render_widget_host_view_aura.h

Index: content/browser/renderer_host/render_widget_host_view_aura.h
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.h b/content/browser/renderer_host/render_widget_host_view_aura.h
index 4535958b43127c196634133112758079a24268a1..38bea6c4b0c620a9640983e1f7e4edcdcc1aa942 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.h
+++ b/content/browser/renderer_host/render_widget_host_view_aura.h
@@ -422,6 +422,8 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
   virtual RenderWidgetHostImpl* GetHost() OVERRIDE;
   virtual void SchedulePaintInRect(
       const gfx::Rect& damage_rect_in_dip) OVERRIDE;
+  virtual void DelegatedCompositorDidSwapBuffers() OVERRIDE {}
+  virtual void DelegatedCompositorAbortedSwapBuffers() OVERRIDE {}
   virtual bool IsVisible() OVERRIDE;
   virtual scoped_ptr<ResizeLock> CreateResizeLock(
       bool defer_compositor_lock) OVERRIDE;