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

extensions/renderer/user_script_set.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_USER_SCRIPT_SET_H_
 #define EXTENSIONS_RENDERER_USER_SCRIPT_SET_H_
 
 #include <set>
 #include <string>
 
@@ skipping 17 matching lines @@
 class ScriptInjection;
 
 // The UserScriptSet is a collection of UserScripts which knows how to update
 // itself from SharedMemory and create ScriptInjections for UserScripts to
 // inject on a page.
 class UserScriptSet {
  public:
   class Observer {
    public:
     virtual void OnUserScriptsUpdated(
-        const std::set<std::string>& changed_extensions,
+        const std::set<HostID>& changed_hosts,
         const std::vector<UserScript*>& scripts) = 0;
   };
 
   explicit UserScriptSet(const ExtensionSet* extensions);
   ~UserScriptSet();
 
   // Adds or removes observers.
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
@@ skipping 12 matching lines @@
   scoped_ptr<ScriptInjection> GetDeclarativeScriptInjection(
       int script_id,
       blink::WebFrame* web_frame,
       int tab_id,
       UserScript::RunLocation run_location,
       const GURL& document_url);
 
   // Updates scripts given the shared memory region containing user scripts.
   // Returns true if the scripts were successfully updated.
   bool UpdateUserScripts(base::SharedMemoryHandle shared_memory,
-                         const std::set<std::string>& changed_extensions);
+                         const std::set<HostID>& changed_hosts);
 
   const std::vector<UserScript*>& scripts() const { return scripts_.get(); }
 
  private:
   // Returns a new ScriptInjection for the given |script| to execute in the
   // |web_frame|, or NULL if the script should not execute.
   scoped_ptr<ScriptInjection> GetInjectionForScript(
       UserScript* script,
       blink::WebFrame* web_frame,
       int tab_id,
@@ skipping 12 matching lines @@
 
   // The associated observers.
   ObserverList<Observer> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(UserScriptSet);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_USER_SCRIPT_SET_H_