Pass Surface ID namespace to renderer compositors.

content/browser/renderer_host/render_widget_host_view_mac.h

Index: content/browser/renderer_host/render_widget_host_view_mac.h
diff --git a/content/browser/renderer_host/render_widget_host_view_mac.h b/content/browser/renderer_host/render_widget_host_view_mac.h
index 499026922fd9ddae695df9f03cab815bf508fba2..683ec37af791f25275dbb8c890d30bccc5290576 100644
--- a/content/browser/renderer_host/render_widget_host_view_mac.h
+++ b/content/browser/renderer_host/render_widget_host_view_mac.h
@@ -345,6 +345,8 @@ class CONTENT_EXPORT RenderWidgetHostViewMac
   void WheelEventAck(const blink::WebMouseWheelEvent& event,
                      InputEventAckState ack_result) override;
 
+  uint32_t GetSurfaceIdNamespace() override;
+
   // IPC::Sender implementation.
   bool Send(IPC::Message* message) override;
 
@@ -440,7 +442,7 @@ class CONTENT_EXPORT RenderWidgetHostViewMac
   };
   BrowserCompositorViewState browser_compositor_state_;
 
-  // Delegated frame management and compositior.
+  // Delegated frame management and compositor.
   scoped_ptr<DelegatedFrameHost> delegated_frame_host_;
   scoped_ptr<ui::Layer> root_layer_;
 
@@ -494,6 +496,8 @@ class CONTENT_EXPORT RenderWidgetHostViewMac
   void DelegatedFrameHostUpdateVSyncParameters(
       const base::TimeTicks& timebase,
       const base::TimeDelta& interval) override;
+  void DelegatedFrameHostUpdateSurfaceIdNamespace(
+      uint32_t surface_id_namespace) override;
 
   // AcceleratedWidgetMacNSView implementation.
   NSView* AcceleratedWidgetGetNSView() const override;