Add service registration for Mojo services defined under chrome/

extensions/browser/extension_web_contents_observer.h

 // Copyright 2014 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 EXTENSIONS_BROWSER_EXTENSION_WEB_CONTENTS_OBSERVER_H_
 #define EXTENSIONS_BROWSER_EXTENSION_WEB_CONTENTS_OBSERVER_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 35 matching lines @@
   // NULL if the render view host is not for a valid extension.
   const Extension* GetExtension(content::RenderViewHost* render_view_host);
 
   // Updates ViewType for RenderViewHost based on GetViewType(web_contents()).
   void NotifyRenderViewType(content::RenderViewHost* render_view_host);
 
   // Returns the extension or app ID associated with a render view host. Returns
   // the empty string if the render view host is not for a valid extension.
   static std::string GetExtensionId(content::RenderViewHost* render_view_host);
 
+  // Registers Mojo services with render_frame_host's ServiceRegistry.
+  // A subclass should invoke this method to register all Mojo services.
+  virtual void RegisterMojoServices(content::RenderFrameHost* render_frame_host,
+                                    const Extension* extension);
+
  private:
   // The BrowserContext associated with the WebContents being observed.
   content::BrowserContext* browser_context_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionWebContentsObserver);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_EXTENSION_WEB_CONTENTS_OBSERVER_H_