Hook up loading signal to ResourceScheduler.

content/browser/renderer_host/render_widget_host_impl.h

Index: content/browser/renderer_host/render_widget_host_impl.h
diff --git a/content/browser/renderer_host/render_widget_host_impl.h b/content/browser/renderer_host/render_widget_host_impl.h
index 6f31db2be8133f51a19ade2a959c49aea47cff19..f6f91b99b725f2476c01f81249096f4826a96919 100644
--- a/content/browser/renderer_host/render_widget_host_impl.h
+++ b/content/browser/renderer_host/render_widget_host_impl.h
@@ -204,6 +204,9 @@ class CONTENT_EXPORT RenderWidgetHostImpl
   // Sends a message to the corresponding object in the renderer.
   virtual bool Send(IPC::Message* msg) OVERRIDE;
 
+  // Indicates if the page has finished loading.
+  virtual void SetIsLoading(bool is_loading);
+
   // Called to notify the RenderWidget that it has been hidden or restored from
   // having been hidden.
   virtual void WasHidden();
@@ -226,9 +229,6 @@ class CONTENT_EXPORT RenderWidgetHostImpl
   // Notifies the RenderWidgetHost that the View was destroyed.
   void ViewDestroyed();
 
-  // Indicates if the page has finished loading.
-  void SetIsLoading(bool is_loading);
-
 #if defined(OS_MACOSX)
   // Pause for a moment to wait for pending repaint or resize messages sent to
   // the renderer to arrive. If pending resize messages are for an old window