Revert 124817 - Take extensions out of Profile into a profile-keyed service, ExtensionSystem.

chrome/browser/extensions/extension_system.h

-// Copyright (c) 2012 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 CHROME_BROWSER_EXTENSIONS_EXTENSION_SYSTEM_H_
-#define CHROME_BROWSER_EXTENSIONS_EXTENSION_SYSTEM_H_
-#pragma once
-
-#include <string>
-
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "chrome/browser/profiles/profile_keyed_service.h"
-#include "chrome/common/extensions/extension_constants.h"
-
-class Extension;
-class ExtensionDevToolsManager;
-class ExtensionEventRouter;
-class ExtensionInfoMap;
-class ExtensionMessageService;
-class ExtensionNavigationObserver;
-class ExtensionPrefs;
-class ExtensionPrefValueMap;
-class ExtensionProcessManager;
-class ExtensionService;
-class Profile;
-class UserScriptMaster;
-
-// The ExtensionSystem manages the creation and destruction of services
-// related to extensions. Most objects are shared between normal
-// and incognito Profiles, except as called out in comments.
-// This interface supports using TestExtensionSystem for TestingProfiles
-// that don't want all of the extensions baggage in their tests.
-class ExtensionSystem : public ProfileKeyedService {
- public:
-  ExtensionSystem();
-  virtual ~ExtensionSystem();
-
-  // ProfileKeyedService implementation.
-  virtual void Shutdown() OVERRIDE {}
-
-  // Initializes extensions machinery.
-  // Component extensions are always enabled, external and user extensions
-  // are controlled by |extensions_enabled|.
-  virtual void Init(bool extensions_enabled) = 0;
-
-  // The ExtensionService is created at startup.
-  virtual ExtensionService* extension_service() = 0;
-
-  //  The ExtensionDevToolsManager is created at startup.
-  virtual ExtensionDevToolsManager* devtools_manager() = 0;
-
-  // The UserScriptMaster is created at startup.
-  virtual UserScriptMaster* user_script_master() = 0;
-
-  // The ExtensionProcessManager is created at startup.
-  virtual ExtensionProcessManager* process_manager() = 0;
-
-  // Returns the IO-thread-accessible extension data.
-  virtual ExtensionInfoMap* info_map() = 0;
-
-  // The ExtensionMessageService is created at startup.
-  virtual ExtensionMessageService* message_service() = 0;
-
-  // The ExtensionEventRouter is created at startup.
-  virtual ExtensionEventRouter* event_router() = 0;
-
-  // Called by the ExtensionService that lives in this system. Gives the
-  // info map a chance to react to the load event before the EXTENSION_LOADED
-  // notification has fired. The purpose for handling this event first is to
-  // avoid race conditions by making sure URLRequestContexts learn about new
-  // extensions before anything else needs them to know.
-  virtual void RegisterExtensionWithRequestContexts(
-      const Extension* extension) {}
-
-  // Called by the ExtensionService that lives in this system. Lets the
-  // info map clean up its RequestContexts once all the listeners to the
-  // EXTENSION_UNLOADED notification have finished running.
-  virtual void UnregisterExtensionWithRequestContexts(
-      const std::string& extension_id,
-      const extension_misc::UnloadedExtensionReason reason) {}
-};
-
-// The ExtensionSystem for ProfileImpl and OffTheRecordProfileImpl.
-// Implementation details: non-shared services are owned by
-// ExtensionSystemImpl, a ProfileKeyedService with separate incognito
-// instances. A private Shared class (also a ProfileKeyedService,
-// but with a shared instance for incognito) keeps the common services.
-class ExtensionSystemImpl : public ExtensionSystem {
- public:
-  explicit ExtensionSystemImpl(Profile* profile);
-  virtual ~ExtensionSystemImpl();
-
-  // ProfileKeyedService implementation.
-  virtual void Shutdown() OVERRIDE;
-
-  virtual void Init(bool extensions_enabled) OVERRIDE;
-
-  virtual ExtensionService* extension_service() OVERRIDE;  // delegated
-  virtual UserScriptMaster* user_script_master() OVERRIDE;  // delegated
-  virtual ExtensionDevToolsManager* devtools_manager() OVERRIDE;
-  virtual ExtensionProcessManager* process_manager() OVERRIDE;
-  virtual ExtensionInfoMap* info_map() OVERRIDE;  // delegated
-  virtual ExtensionMessageService* message_service() OVERRIDE;  // delegated
-  virtual ExtensionEventRouter* event_router() OVERRIDE;  // delegated
-
-  virtual void RegisterExtensionWithRequestContexts(
-      const Extension* extension) OVERRIDE;
-
-  virtual void UnregisterExtensionWithRequestContexts(
-      const std::string& extension_id,
-      const extension_misc::UnloadedExtensionReason reason) OVERRIDE;
-
- private:
-  friend class ExtensionSystemSharedFactory;
-
-  // Owns the Extension-related systems that have a single instance
-  // shared between normal and incognito profiles.
-  class Shared : public ProfileKeyedService {
-   public:
-    explicit Shared(Profile* profile);
-    virtual ~Shared();
-
-    // ProfileKeyedService implementation.
-    virtual void Shutdown() OVERRIDE;
-
-    // Initialization takes place in phases.
-    virtual void InitPrefs();
-    void InitInfoMap();
-    void Init(bool extensions_enabled);
-
-    ExtensionService* extension_service();
-    UserScriptMaster* user_script_master();
-    ExtensionInfoMap* info_map();
-    ExtensionMessageService* message_service();
-    ExtensionEventRouter* event_router();
-
-   private:
-    Profile* profile_;
-
-    // The services that are shared between normal and incognito profiles.
-
-    // Keep extension_prefs_ on top of extension_service_ because the latter
-    // maintains a pointer to the first and shall be destructed first.
-    scoped_ptr<ExtensionPrefs> extension_prefs_;
-    scoped_ptr<ExtensionService> extension_service_;
-    scoped_refptr<UserScriptMaster> user_script_master_;
-    // extension_info_map_ needs to outlive extension_process_manager_.
-    scoped_refptr<ExtensionInfoMap> extension_info_map_;
-    scoped_refptr<ExtensionMessageService> extension_message_service_;
-    scoped_ptr<ExtensionEventRouter> extension_event_router_;
-    scoped_ptr<ExtensionNavigationObserver> extension_navigation_observer_;
-  };
-
-  Profile* profile_;
-
-  Shared* shared_;
-
-  // The services that have their own instances in incognito.
-  scoped_refptr<ExtensionDevToolsManager> extension_devtools_manager_;
-  // |extension_process_manager_| must be destroyed before the Profile's
-  // |io_data_|. While |extension_process_manager_| still lives, we handle
-  // incoming resource requests from extension processes and those require
-  // access to the ResourceContext owned by |io_data_|.
-  scoped_ptr<ExtensionProcessManager> extension_process_manager_;
-};
-
-#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SYSTEM_H_