Refactoring: de-couple Extensions from "script injection System" [render side]:3

extensions/renderer/user_script_set_manager.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_MANAGER_H_
 #define EXTENSIONS_RENDERER_USER_SCRIPT_SET_MANAGER_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 38 matching lines @@
         const std::vector<UserScript*>& scripts) = 0;
   };
 
   UserScriptSetManager(const ExtensionSet* extensions);
 
   ~UserScriptSetManager() override;
 
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
-  // Looks up the script injection associated with |script_id| and |extension|
-  // in the context of the given |web_frame|, |tab_id|, and |url|.
+  // Looks up the script injection associated with |script_id| and
+  // |extension_id| in the context of the given |web_frame|, |tab_id|,
+  // and |url|.
   scoped_ptr<ScriptInjection> GetInjectionForDeclarativeScript(
       int script_id,
       blink::WebFrame* web_frame,
       int tab_id,
       const GURL& url,
-      const Extension* extension);
+      const std::string& extension_id);
 
   // Append all injections from |static_scripts| and each of
   // |programmatic_scripts_| to |injections|.
   void GetAllInjections(ScopedVector<ScriptInjection>* injections,
                         blink::WebFrame* web_frame,
                         int tab_id,
                         UserScript::RunLocation run_location);
 
   // Get active extension IDs from |static_scripts| and each of
   // |programmatic_scripts_|.
@@ skipping 28 matching lines @@
 
   // The associated observers.
   ObserverList<Observer> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(UserScriptSetManager);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_USER_SCRIPT_SET_MANAGER_H_