Get rid of extensions dependency from content\browser.

content/browser/content_browser_client.h

 // Copyright (c) 2011 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_BROWSER_CONTENT_BROWSER_CLIENT_H_
 #define CONTENT_BROWSER_CONTENT_BROWSER_CLIENT_H_
 #pragma once
 
 #include "content/common/content_client.h"
 
 class GURL;
 class Profile;
 class RenderViewHost;
 
 namespace content {
 
 class WebUIFactory;
 
 // Embedder API for participating in browser logic.
 class ContentBrowserClient {
  public:
   // Initialize a RenderViewHost before its CreateRenderView method is called.
   virtual void PreCreateRenderView(RenderViewHost* render_view_host,
                                    Profile* profile,
                                    const GURL& url) {}
 
   // Gets the WebUIFactory which will be responsible for generating WebUIs.
   virtual WebUIFactory* GetWebUIFactory();
+
+  // Get the effective URL for the given actual URL, to allow an embedder to
+  // group different url schemes in the same SiteInstance.
+  virtual GURL GetEffectiveURL(Profile* profile, const GURL& url);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_CONTENT_BROWSER_CLIENT_H_