Initialize content scripts the same way extension scripts are.

chrome/renderer/extensions/user_script_slave.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 CHROME_RENDERER_EXTENSIONS_USER_SCRIPT_SLAVE_H_
 #define CHROME_RENDERER_EXTENSIONS_USER_SCRIPT_SLAVE_H_
 #pragma once
 
 #include <map>
 #include <set>
@@ skipping 39 matching lines @@
   int GetIsolatedWorldIdForExtension(const Extension* extension,
                                      WebKit::WebFrame* frame);
 
   // Gets the id of the extension running in a given isolated world. If no such
   // isolated world exists, or no extension is running in it, returns empty
   // string.
   std::string GetExtensionIdForIsolatedWorld(int isolated_world_id);
 
   void RemoveIsolatedWorld(const std::string& extension_id);
 
-  static void InsertInitExtensionCode(std::vector<WebScriptSource>* sources,
-                                      const std::string& extension_id);
  private:
   static void InitializeIsolatedWorld(int isolated_world_id,
                                       const Extension* extension);
 
   // Shared memory containing raw script data.
   scoped_ptr<base::SharedMemory> shared_memory_;
 
   // Parsed script data.
   std::vector<UserScript*> scripts_;
   STLElementDeleter<std::vector<UserScript*> > script_deleter_;
 
   // Greasemonkey API source that is injected with the scripts.
   base::StringPiece api_js_;
 
   // Extension metadata.
   const ExtensionSet* extensions_;
 
   typedef std::map<std::string, int> IsolatedWorldMap;
   IsolatedWorldMap isolated_world_ids_;
 
   DISALLOW_COPY_AND_ASSIGN(UserScriptSlave);
 };
 
 #endif  // CHROME_RENDERER_EXTENSIONS_USER_SCRIPT_SLAVE_H_