Enable BeginFrame scheduling on aura

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 462cf87992a90d131b354dff27765148ec759e8c..033ac7c01b765eaa5386069d462a929bc27262d0 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.h
+++ b/content/browser/renderer_host/render_widget_host_view_aura.h
@@ -20,6 +20,7 @@
 #include "content/browser/compositor/delegated_frame_host.h"
 #include "content/browser/compositor/image_transport_factory.h"
 #include "content/browser/compositor/owned_mailbox.h"
+#include "content/browser/renderer_host/begin_frame_observer_proxy.h"
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "content/common/content_export.h"
 #include "content/common/cursors/webcursor.h"
@@ -80,6 +81,7 @@ class RenderWidgetHostView;
 class CONTENT_EXPORT RenderWidgetHostViewAura
     : public RenderWidgetHostViewBase,
       public DelegatedFrameHostClient,
+      public BeginFrameObserverProxyClient,
       public ui::TextInputClient,
       public gfx::DisplayObserver,
       public aura::WindowTreeHostObserver,
@@ -476,6 +478,9 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
       const base::TimeTicks& timebase,
       const base::TimeDelta& interval) override;
 
+  // BeginFrameObserverProxyClient implementation.
+  void SendBeginFrame(const cc::BeginFrameArgs& args) override;
+
   // Detaches |this| from the input method object.
   void DetachFromInputMethod();
 
@@ -497,6 +502,9 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
   // Helper function to set keyboard focus to the main window.
   void SetKeyboardFocus();
 
+  // Called when RenderWidget wants to start BeginFrame scheduling or stop.
+  void OnSetNeedsBeginFrames(bool needs_begin_frames);
+
   RenderFrameHostImpl* GetFocusedFrame();
 
   // Returns true if the |event| passed in can be forwarded to the renderer.
@@ -671,6 +679,8 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
   // compositing surface and showing the disambiguation popup.
   gfx::Vector2dF disambiguation_scroll_offset_;
 
+  BeginFrameObserverProxy begin_frame_observer_proxy_;
+
   base::WeakPtrFactory<RenderWidgetHostViewAura> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAura);
 };