Split ExtensionSystem interface from ExtensionSystemImpl implementation, part 1.

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_
-
-#include <string>
-
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "components/browser_context_keyed_service/browser_context_keyed_service.h"
-#include "extensions/common/extension.h"
-#include "extensions/common/one_shot_event.h"
-
-class ExtensionService;
-class Profile;
-
-#if defined(OS_CHROMEOS)
-namespace chromeos {
-class DeviceLocalAccountManagementPolicyProvider;
-}
-#endif  // defined(OS_CHROMEOS)
-
-namespace content {
-class BrowserContext;
-}
-
-namespace extensions {
-class Blacklist;
-class ErrorConsole;
-class EventRouter;
-class Extension;
-class ExtensionSystemSharedFactory;
-class ExtensionWarningBadgeService;
-class ExtensionWarningService;
-class InfoMap;
-class InstallVerifier;
-class LazyBackgroundTaskQueue;
-class ManagementPolicy;
-class NavigationObserver;
-class ProcessManager;
-class RuntimeData;
-class StandardManagementPolicyProvider;
-class StateStore;
-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 BrowserContextKeyedService {
- public:
-  ExtensionSystem();
-  virtual ~ExtensionSystem();
-
-  // Returns the instance for the given profile, or NULL if none. This is
-  // a convenience wrapper around ExtensionSystemFactory::GetForProfile.
-  static ExtensionSystem* Get(Profile* profile);
-
-  // Returns the same instance as Get() above.
-  static ExtensionSystem* GetForBrowserContext(
-      content::BrowserContext* profile);
-
-  // BrowserContextKeyedService implementation.
-  virtual void Shutdown() OVERRIDE {}
-
-  // Initializes extensions machinery.
-  // Component extensions are always enabled, external and user extensions are
-  // controlled by |extensions_enabled|.
-  virtual void InitForRegularProfile(bool extensions_enabled) = 0;
-
-  // The ExtensionService is created at startup.
-  virtual ExtensionService* extension_service() = 0;
-
-  // Per-extension data that can change during the life of the process but
-  // does not persist across restarts. Lives on UI thread. Created at startup.
-  virtual RuntimeData* runtime_data() = 0;
-
-  // The class controlling whether users are permitted to perform certain
-  // actions on extensions (install, uninstall, disable, etc.).
-  // The ManagementPolicy is created at startup.
-  virtual ManagementPolicy* management_policy() = 0;
-
-  // The UserScriptMaster is created at startup.
-  virtual UserScriptMaster* user_script_master() = 0;
-
-  // The ProcessManager is created at startup.
-  virtual ProcessManager* process_manager() = 0;
-
-  // The StateStore is created at startup.
-  virtual StateStore* state_store() = 0;
-
-  // The rules store is created at startup.
-  virtual StateStore* rules_store() = 0;
-
-  // Returns the IO-thread-accessible extension data.
-  virtual InfoMap* info_map() = 0;
-
-  // The LazyBackgroundTaskQueue is created at startup.
-  virtual LazyBackgroundTaskQueue* lazy_background_task_queue() = 0;
-
-  // The EventRouter is created at startup.
-  virtual EventRouter* event_router() = 0;
-
-  // The ExtensionWarningService is created at startup.
-  virtual ExtensionWarningService* warning_service() = 0;
-
-  // The blacklist is created at startup.
-  virtual Blacklist* blacklist() = 0;
-
-  // The ErrorConsole is created at startup.
-  virtual ErrorConsole* error_console() = 0;
-
-  // The InstallVerifier is created at startup.
-  virtual InstallVerifier* install_verifier() = 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 UnloadedExtensionInfo::Reason reason) {}
-
-  // Signaled when the extension system has completed its startup tasks.
-  virtual const OneShotEvent& ready() const = 0;
-};
-
-// The ExtensionSystem for ProfileImpl and OffTheRecordProfileImpl.
-// Implementation details: non-shared services are owned by
-// ExtensionSystemImpl, a BrowserContextKeyedService with separate incognito
-// instances. A private Shared class (also a BrowserContextKeyedService,
-// but with a shared instance for incognito) keeps the common services.
-class ExtensionSystemImpl : public ExtensionSystem {
- public:
-  explicit ExtensionSystemImpl(Profile* profile);
-  virtual ~ExtensionSystemImpl();
-
-  // BrowserContextKeyedService implementation.
-  virtual void Shutdown() OVERRIDE;
-
-  virtual void InitForRegularProfile(bool extensions_enabled) OVERRIDE;
-
-  virtual ExtensionService* extension_service() OVERRIDE;  // shared
-  virtual RuntimeData* runtime_data() OVERRIDE;  // shared
-  virtual ManagementPolicy* management_policy() OVERRIDE;  // shared
-  virtual UserScriptMaster* user_script_master() OVERRIDE;  // shared
-  virtual ProcessManager* process_manager() OVERRIDE;
-  virtual StateStore* state_store() OVERRIDE;  // shared
-  virtual StateStore* rules_store() OVERRIDE;  // shared
-  virtual LazyBackgroundTaskQueue* lazy_background_task_queue()
-      OVERRIDE;  // shared
-  virtual InfoMap* info_map() OVERRIDE; // shared
-  virtual EventRouter* event_router() OVERRIDE;  // shared
-  virtual ExtensionWarningService* warning_service() OVERRIDE;
-  virtual Blacklist* blacklist() OVERRIDE;  // shared
-  virtual ErrorConsole* error_console() OVERRIDE;
-  virtual InstallVerifier* install_verifier() OVERRIDE;
-
-  virtual void RegisterExtensionWithRequestContexts(
-      const Extension* extension) OVERRIDE;
-
-  virtual void UnregisterExtensionWithRequestContexts(
-      const std::string& extension_id,
-      const UnloadedExtensionInfo::Reason reason) OVERRIDE;
-
-  virtual const OneShotEvent& ready() const OVERRIDE;
-
- private:
-  friend class ExtensionSystemSharedFactory;
-
-  // Owns the Extension-related systems that have a single instance
-  // shared between normal and incognito profiles.
-  class Shared : public BrowserContextKeyedService {
-   public:
-    explicit Shared(Profile* profile);
-    virtual ~Shared();
-
-    // Initialization takes place in phases.
-    virtual void InitPrefs();
-    // This must not be called until all the providers have been created.
-    void RegisterManagementPolicyProviders();
-    void Init(bool extensions_enabled);
-
-    // BrowserContextKeyedService implementation.
-    virtual void Shutdown() OVERRIDE;
-
-    StateStore* state_store();
-    StateStore* rules_store();
-    ExtensionService* extension_service();
-    RuntimeData* runtime_data();
-    ManagementPolicy* management_policy();
-    UserScriptMaster* user_script_master();
-    Blacklist* blacklist();
-    InfoMap* info_map();
-    LazyBackgroundTaskQueue* lazy_background_task_queue();
-    EventRouter* event_router();
-    ExtensionWarningService* warning_service();
-    ErrorConsole* error_console();
-    InstallVerifier* install_verifier();
-    const OneShotEvent& ready() const { return ready_; }
-
-   private:
-    Profile* profile_;
-
-    // The services that are shared between normal and incognito profiles.
-
-    scoped_ptr<StateStore> state_store_;
-    scoped_ptr<StateStore> rules_store_;
-    // LazyBackgroundTaskQueue is a dependency of
-    // MessageService and EventRouter.
-    scoped_ptr<LazyBackgroundTaskQueue> lazy_background_task_queue_;
-    scoped_ptr<EventRouter> event_router_;
-    scoped_ptr<NavigationObserver> navigation_observer_;
-    scoped_refptr<UserScriptMaster> user_script_master_;
-    scoped_ptr<Blacklist> blacklist_;
-    // StandardManagementPolicyProvider depends on Blacklist.
-    scoped_ptr<StandardManagementPolicyProvider>
-        standard_management_policy_provider_;
-    scoped_ptr<RuntimeData> runtime_data_;
-    // ExtensionService depends on StateStore, Blacklist and RuntimeData.
-    scoped_ptr<ExtensionService> extension_service_;
-    scoped_ptr<ManagementPolicy> management_policy_;
-    // extension_info_map_ needs to outlive process_manager_.
-    scoped_refptr<InfoMap> extension_info_map_;
-    scoped_ptr<ExtensionWarningService> extension_warning_service_;
-    scoped_ptr<ExtensionWarningBadgeService> extension_warning_badge_service_;
-    scoped_ptr<ErrorConsole> error_console_;
-    scoped_ptr<InstallVerifier> install_verifier_;
-
-#if defined(OS_CHROMEOS)
-    scoped_ptr<chromeos::DeviceLocalAccountManagementPolicyProvider>
-        device_local_account_management_policy_provider_;
-#endif
-
-    OneShotEvent ready_;
-  };
-
-  Profile* profile_;
-
-  Shared* shared_;
-
-  // |process_manager_| must be destroyed before the Profile's |io_data_|. While
-  // |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<ProcessManager> process_manager_;
-
-  DISALLOW_COPY_AND_ASSIGN(ExtensionSystemImpl);
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SYSTEM_H_