Revert 176015

chrome/browser/extensions/api/storage/managed_value_store_cache.h

Index: chrome/browser/extensions/api/storage/managed_value_store_cache.h
===================================================================
--- chrome/browser/extensions/api/storage/managed_value_store_cache.h	(revision 176046)
+++ chrome/browser/extensions/api/storage/managed_value_store_cache.h	(working copy)
@@ -1,154 +0,0 @@
-// 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_API_STORAGE_MANAGED_VALUE_STORE_CACHE_H_
-#define CHROME_BROWSER_EXTENSIONS_API_STORAGE_MANAGED_VALUE_STORE_CACHE_H_
-
-#include <map>
-#include <string>
-
-#include "base/basictypes.h"
-#include "base/callback_forward.h"
-#include "base/compiler_specific.h"
-#include "base/file_path.h"
-#include "base/memory/linked_ptr.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/weak_ptr.h"
-#include "chrome/browser/extensions/api/storage/settings_observer.h"
-#include "chrome/browser/extensions/api/storage/value_store_cache.h"
-#include "chrome/browser/extensions/event_router.h"
-#include "chrome/browser/policy/policy_service.h"
-
-namespace policy {
-class PolicyMap;
-}
-
-namespace extensions {
-
-class PolicyValueStore;
-class SettingsStorageFactory;
-
-// A ValueStoreCache that manages a PolicyValueStore for each extension that
-// uses the storage.managed namespace. This class observes policy changes and
-// which extensions listen for storage.onChanged(), and sends the appropriate
-// updates to the corresponding PolicyValueStore on the FILE thread.
-class ManagedValueStoreCache : public ValueStoreCache,
-                               public policy::PolicyService::Observer,
-                               public EventRouter::Observer {
- public:
-  // |policy_service| is used to retrieve policy for extensions, and to observe
-  // policy updates.
-  // ||event_router| is used to observe which extensions listen for onChanged.
-  // |factory| is used to create databases for the PolicyValueStores.
-  // |observers| is the list of SettingsObservers to notify when a ValueStore
-  // changes.
-  // |profile_path| is the path for the profile. The databases are created in
-  // a directory under this path.
-  ManagedValueStoreCache(policy::PolicyService* policy_service,
-                         EventRouter* event_router,
-                         const scoped_refptr<SettingsStorageFactory>& factory,
-                         const scoped_refptr<SettingsObserverList>& observers,
-                         const FilePath& profile_path);
-  virtual ~ManagedValueStoreCache();
-
- private:
-  // Maps an extension ID to its PolicyValueStoreMap.
-  typedef std::map<std::string, linked_ptr<PolicyValueStore> >
-      PolicyValueStoreMap;
-
-  // ValueStoreCache implementation:
-  virtual void ShutdownOnUI() OVERRIDE;
-  virtual void RunWithValueStoreForExtension(
-      const StorageCallback& callback,
-      scoped_refptr<const Extension> extension) OVERRIDE;
-  virtual void DeleteStorageSoon(const std::string& extension_id) OVERRIDE;
-
-  // PolicyService::Observer implementation:
-  virtual void OnPolicyUpdated(policy::PolicyDomain domain,
-                               const std::string& component_id,
-                               const policy::PolicyMap& previous,
-                               const policy::PolicyMap& current) OVERRIDE;
-
-  // Posted by OnPolicyUpdated() to update a PolicyValueStore on the FILE
-  // thread.
-  void UpdatePolicyOnFILE(const std::string& extension_id,
-                          scoped_ptr<policy::PolicyMap> current_policy);
-
-  // EventRouter::Observer implementation:
-  virtual void OnListenerAdded(const EventListenerInfo& details) OVERRIDE;
-
-  // Posted by OnListenerAdded() to load or create a PolicyValueStore for the
-  // given |extension_id|.
-  void CreateForExtensionOnFILE(const std::string& extension_id);
-
-  // Returns an existing PolicyValueStore for |extension_id|, or NULL.
-  PolicyValueStore* GetStoreFor(const std::string& extension_id);
-
-  // Creates a new PolicyValueStore for |extension_id|. This may open an
-  // existing database, or create a new one. This also sends the current policy
-  // for |extension_id| to the database. When |notify_if_changed| is true,
-  // a notification is sent with the changes between the current policy and the
-  // previously stored policy, if there are any.
-  //
-  // Since this is used on FILE but must retrieve the current policy, this
-  // method first posts GetInitialPolicy() to UI and then resumes in
-  // CreateStoreWithInitialPolicy(). If |continuation| is not null then it
-  // will be invoked after the store is created.
-  //
-  // CreateStoreFor() can be safely invoked from any method on the FILE thread.
-  // It posts to UI used |weak_this_on_ui_|, so that the task is dropped if
-  // ShutdownOnUI() has been invoked. Otherwise, GetInitialPolicy() executes
-  // on UI and can safely post CreateStoreWithInitialPolicy to FILE.
-  // CreateStoreWithInitialPolicy then guarantees that a store for
-  // |extension_id| exists or is created, and then executes the |continuation|;
-  // so when the |continuation| executes, a store for |extension_id| is
-  // guaranteed to exist.
-  void CreateStoreFor(const std::string& extension_id,
-                      bool notify_if_changed,
-                      const base::Closure& continuation);
-
-  // Helper for CreateStoreFor, invoked on UI.
-  void GetInitialPolicy(const std::string& extension_id,
-                        bool notify_if_changed,
-                        const base::Closure& continuation);
-
-  // Helper for CreateStoreFor, invoked on FILE.
-  void CreateStoreWithInitialPolicy(const std::string& extension_id,
-                                    bool notify_if_changed,
-                                    scoped_ptr<policy::PolicyMap> policy,
-                                    const base::Closure& continuation);
-
-  // Used to create a WeakPtr valid on the UI thread, so that FILE tasks can
-  // post back to UI.
-  base::WeakPtrFactory<ManagedValueStoreCache> weak_factory_;
-
-  // A WeakPtr to |this| that is valid on UI. This is used by tasks on the FILE
-  // thread to post back to UI.
-  base::WeakPtr<ManagedValueStoreCache> weak_this_on_ui_;
-
-  // The PolicyService that is observed for policy updates. Lives on UI.
-  policy::PolicyService* policy_service_;
-
-  // The EventRouter is created before the SettingsFrontend (which owns the
-  // instance of this class), and the SettingsFrontend is also destroyed before
-  // the EventRouter is. |event_router_| is thus valid for the lifetime of this
-  // object, until ShutdownOnUI() is invoked. Lives on UI.
-  EventRouter* event_router_;
-
-  // These live on the FILE thread.
-  scoped_refptr<SettingsStorageFactory> storage_factory_;
-  scoped_refptr<SettingsObserverList> observers_;
-  FilePath base_path_;
-
-  // All the PolicyValueStores live on the FILE thread, and |store_map_| can be
-  // accessed only on the FILE thread as well.
-  PolicyValueStoreMap store_map_;
-
-  DISALLOW_COPY_AND_ASSIGN(ManagedValueStoreCache);
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_API_STORAGE_MANAGED_VALUE_STORE_CACHE_H_