Create thread-safe RendererExtensionRegistry from ExtensionSet

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>
 
 #include "base/memory/linked_ptr.h"
 #include "base/memory/shared_memory.h"
 #include "base/observer_list.h"
 #include "content/public/renderer/render_process_observer.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/user_script.h"
 #include "extensions/renderer/user_script_set.h"
 
 namespace content {
 class RenderFrame;
 }
 
 namespace IPC {
 class Message;
 }
 
 namespace extensions {
 
-class ExtensionSet;
 class ScriptInjection;
 
 // Manager for separate UserScriptSets, one for each shared memory region.
 // Regions are organized as follows:
 // static_scripts -- contains all extensions' scripts that are statically
 //                   declared in the extension manifest.
 // programmatic_scripts -- one region per host (extension or WebUI) containing
 //                         only programmatically-declared scripts, instantiated
 //                         when an extension first creates a declarative rule
 //                         that would, if triggered, request a script injection.
 class UserScriptSetManager : public content::RenderProcessObserver {
  public:
   // Like a UserScriptSet::Observer, but automatically subscribes to all sets
   // associated with the manager.
   class Observer {
    public:
     virtual void OnUserScriptsUpdated(
         const std::set<HostID>& changed_hosts,
         const std::vector<UserScript*>& scripts) = 0;
   };
 
-  UserScriptSetManager(const ExtensionSet* extensions);
+  UserScriptSetManager();
 
   ~UserScriptSetManager() override;
 
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
   // 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(
@@ skipping 31 matching lines @@
                            const std::set<HostID>& changed_hosts,
                            bool whitelisted_only);
 
   // Scripts statically defined in extension manifests.
   UserScriptSet static_scripts_;
 
   // Scripts programmatically-defined through API calls (initialized and stored
   // per-extension).
   UserScriptSetMap programmatic_scripts_;
 
-  // The set of all known extensions. Owned by the Dispatcher.
-  const ExtensionSet* extensions_;
-
   // The associated observers.
   base::ObserverList<Observer> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(UserScriptSetManager);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_USER_SCRIPT_SET_MANAGER_H_