Revert 176015

chrome/browser/extensions/api/storage/policy_value_store.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_API_STORAGE_POLICY_VALUE_STORE_H_
-#define CHROME_BROWSER_EXTENSIONS_API_STORAGE_POLICY_VALUE_STORE_H_
-
-#include <string>
-#include <vector>
-
-#include "base/compiler_specific.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "chrome/browser/extensions/api/storage/settings_observer.h"
-#include "chrome/browser/value_store/value_store.h"
-
-namespace policy {
-class PolicyMap;
-}
-
-namespace extensions {
-
-// A ValueStore that is backed by another, persistent ValueStore, and stores
-// the policies for a specific extension there. This ValueStore is used to
-// run the function of the storage.managed namespace; it's read-only for the
-// extension. The ManagedValueStoreCache sends updated policy to this store
-// and manages its lifetime.
-class PolicyValueStore : public ValueStore {
- public:
-  PolicyValueStore(const std::string& extension_id,
-                   const scoped_refptr<SettingsObserverList>& observers,
-                   scoped_ptr<ValueStore> delegate);
-  virtual ~PolicyValueStore();
-
-  // Stores |policy| in the persistent database represented by the |delegate_|.
-  // If |notify_if_changed| and |policy| differs from the previously persisted
-  // version, then a notification is sent to the |observers_| with a list of the
-  // changes detected.
-  void SetCurrentPolicy(const policy::PolicyMap& policy,
-                        bool notify_if_changed);
-
-  // Clears all the stored data and deletes the database.
-  void DeleteStorage();
-
-  // ValueStore implementation:
-  virtual size_t GetBytesInUse(const std::string& key) OVERRIDE;
-  virtual size_t GetBytesInUse(const std::vector<std::string>& keys) OVERRIDE;
-  virtual size_t GetBytesInUse() OVERRIDE;
-  virtual ReadResult Get(const std::string& key) OVERRIDE;
-  virtual ReadResult Get(const std::vector<std::string>& keys) OVERRIDE;
-  virtual ReadResult Get() OVERRIDE;
-  virtual WriteResult Set(
-      WriteOptions options,
-      const std::string& key,
-      const base::Value& value) OVERRIDE;
-  virtual WriteResult Set(
-      WriteOptions options, const base::DictionaryValue& values) OVERRIDE;
-  virtual WriteResult Remove(const std::string& key) OVERRIDE;
-  virtual WriteResult Remove(const std::vector<std::string>& keys) OVERRIDE;
-  virtual WriteResult Clear() OVERRIDE;
-
-  // For unit tests.
-  ValueStore* delegate() { return delegate_.get(); }
-
- private:
-  std::string extension_id_;
-  scoped_refptr<SettingsObserverList> observers_;
-  scoped_ptr<ValueStore> delegate_;
-
-  DISALLOW_COPY_AND_ASSIGN(PolicyValueStore);
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_API_STORAGE_POLICY_VALUE_STORE_H_