Refactoring: de-couple Extensions from "script injection System" [render side]:4

extensions/renderer/dispatcher.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_RENDERER_DISPATCHER_H_
 #define EXTENSIONS_RENDERER_DISPATCHER_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 182 matching lines @@
                                       const URLPatternSet& new_hosts,
                                       bool update_origin_whitelist,
                                       int tab_id);
   void OnClearTabSpecificPermissions(
       const std::vector<std::string>& extension_ids,
       bool update_origin_whitelist,
       int tab_id);
   void OnUsingWebRequestAPI(bool webrequest_used);
 
   // UserScriptSetManager::Observer implementation.
-  void OnUserScriptsUpdated(const std::set<std::string>& changed_extensions,
+  void OnUserScriptsUpdated(const std::set<HostID>& changed_hosts,
                             const std::vector<UserScript*>& scripts) override;
 
   void UpdateActiveExtensions();
 
   // Sets up the host permissions for |extension|.
   void InitOriginPermissions(const Extension* extension);
 
   // Updates the host permissions for the extension url to include only those in
   // |new_patterns|, and remove from |old_patterns| that are no longer allowed.
   void UpdateOriginPermissions(const GURL& extension_url,
@@ skipping 109 matching lines @@
 
   // Status of webrequest usage.
   bool webrequest_used_;
 
   DISALLOW_COPY_AND_ASSIGN(Dispatcher);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_DISPATCHER_H_