Extension Settings API: make it so that when changes received from Sync fail to

chrome/browser/extensions/settings/in_memory_settings_storage.h

-// Copyright (c) 2011 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_SETTINGS_IN_MEMORY_SETTINGS_STORAGE_H_
-#define CHROME_BROWSER_EXTENSIONS_SETTINGS_IN_MEMORY_SETTINGS_STORAGE_H_
-#pragma once
-
-#include "base/compiler_specific.h"
-#include "chrome/browser/extensions/settings/settings_storage.h"
-
-namespace extensions {
-
-// In-memory storage, as opposed to SettingsLeveldbStorage.
-class InMemorySettingsStorage : public SettingsStorage {
- public:
-  InMemorySettingsStorage() {}
-
-  // SettingsStorage implementation.
-  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(const std::string& key, const Value& value) OVERRIDE;
-  virtual WriteResult Set(const 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;
-
- private:
-  DictionaryValue storage_;
-
-  DISALLOW_COPY_AND_ASSIGN(InMemorySettingsStorage);
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_SETTINGS_IN_MEMORY_SETTINGS_STORAGE_H_