| Index: content/browser/renderer_host/render_widget_host_view_base.h | 
| diff --git a/content/browser/renderer_host/render_widget_host_view_base.h b/content/browser/renderer_host/render_widget_host_view_base.h | 
| index c858f5e650611d01c599f1983ffe3d0709df1c96..4f55531e8fd9419c009cc64792f9d4e3a4b4537d 100644 | 
| --- a/content/browser/renderer_host/render_widget_host_view_base.h | 
| +++ b/content/browser/renderer_host/render_widget_host_view_base.h | 
| @@ -179,6 +179,10 @@ class CONTENT_EXPORT RenderWidgetHostViewBase : public RenderWidgetHostView, | 
|  | 
| virtual void DidStopFlinging() {} | 
|  | 
| +  // Returns the compositing surface ID namespace, or 0 if Surfaces are not | 
| +  // enabled. | 
| +  virtual uint32_t GetSurfaceIdNamespace(); | 
| + | 
| //---------------------------------------------------------------------------- | 
| // The following static methods are implemented by each platform. | 
|  | 
|  |