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

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>
 
 #include "base/basictypes.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/shared_memory.h"
 #include "base/observer_list.h"
 #include "content/public/renderer/render_process_observer.h"
 #include "extensions/common/user_script.h"
 
+class InjectionHost;
 class GURL;
 
 namespace blink {
 class WebFrame;
 }
 
 namespace extensions {
-class Extension;
 class ExtensionSet;
 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:
@@ skipping 20 matching lines @@
                      blink::WebFrame* web_frame,
                      int tab_id,
                      UserScript::RunLocation run_location);
 
   scoped_ptr<ScriptInjection> GetDeclarativeScriptInjection(
       int script_id,
       blink::WebFrame* web_frame,
       int tab_id,
       UserScript::RunLocation run_location,
       const GURL& document_url,
-      const Extension* extension);
+      const InjectionHost* injection_host);
 
   // 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::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,
       UserScript::RunLocation run_location,
       const GURL& document_url,
-      const Extension* extension,
+      const InjectionHost* injection_host,
       bool is_declarative);
 
   // Shared memory containing raw script data.
   scoped_ptr<base::SharedMemory> shared_memory_;
 
   // The set of all known extensions. Owned by the Dispatcher.
   const ExtensionSet* extensions_;
 
   // The UserScripts this injector manages.
   ScopedVector<UserScript> scripts_;
 
   // The associated observers.
   ObserverList<Observer> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(UserScriptSet);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_USER_SCRIPT_SET_H_