UMA stats to count RenderFrameProxyHosts

content/public/browser/render_frame_host.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_BROWSER_RENDER_FRAME_HOST_H_
 #define CONTENT_PUBLIC_BROWSER_RENDER_FRAME_HOST_H_
 
 #include <string>
 
 #include "base/callback_forward.h"
@@ skipping 175 matching lines @@
   virtual ServiceRegistry* GetServiceRegistry() = 0;
 
   // Returns the visibility state of the frame. The different visibility states
   // of a frame are defined in Blink.
   virtual blink::WebPageVisibilityState GetVisibilityState() = 0;
 
   // Returns whether the RenderFrame in the renderer process has been created
   // and still has a connection.  This is valid for all frames.
   virtual bool IsRenderFrameLive() = 0;
 
+  // Get the number of proxies to this frame, in all processes. Exposed for
+  // use by resource metrics.
+  virtual int GetProxyCount() = 0;
+
 #if defined(OS_ANDROID)
   // Selects and zooms to the find result nearest to the point (x,y)
   // defined in find-in-page coordinates.
   virtual void ActivateNearestFindResult(int request_id, float x, float y) = 0;
 
   // Asks the renderer process to send the rects of the current find matches.
   virtual void RequestFindMatchRects(int current_version) = 0;
 #endif
 
  private:
   // This interface should only be implemented inside content.
   friend class RenderFrameHostImpl;
   RenderFrameHost() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_RENDER_FRAME_HOST_H_