Move extensions storage API implementation to src/extensions

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

-// Copyright 2014 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_LOCAL_VALUE_STORE_CACHE_H_
-#define CHROME_BROWSER_EXTENSIONS_API_STORAGE_LOCAL_VALUE_STORE_CACHE_H_
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "chrome/browser/extensions/api/storage/value_store_cache.h"
-
-namespace base {
-class FilePath;
-}
-
-namespace extensions {
-
-class SettingsBackend;
-class SettingsStorageFactory;
-
-// ValueStoreCache for the LOCAL namespace. It owns a backend for apps and
-// another for extensions. Each backend takes care of persistence.
-class LocalValueStoreCache : public ValueStoreCache {
- public:
-  LocalValueStoreCache(const scoped_refptr<SettingsStorageFactory>& factory,
-                       const base::FilePath& profile_path);
-  virtual ~LocalValueStoreCache();
-
-  // ValueStoreCache implementation:
-  virtual void RunWithValueStoreForExtension(
-      const StorageCallback& callback,
-      scoped_refptr<const Extension> extension) OVERRIDE;
-  virtual void DeleteStorageSoon(const std::string& extension_id) OVERRIDE;
-
- private:
-  void InitOnFileThread(const scoped_refptr<SettingsStorageFactory>& factory,
-                        const base::FilePath& profile_path);
-
-  bool initialized_;
-  scoped_ptr<SettingsBackend> app_backend_;
-  scoped_ptr<SettingsBackend> extension_backend_;
-
-  DISALLOW_COPY_AND_ASSIGN(LocalValueStoreCache);
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_API_STORAGE_LOCAL_VALUE_STORE_CACHE_H_