Revert of Add a Restore() method to ValueStore and make StorageAPI use it

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

Index: chrome/browser/extensions/api/storage/local_storage_backend.h
diff --git a/chrome/browser/extensions/api/storage/local_storage_backend.h b/chrome/browser/extensions/api/storage/local_storage_backend.h
deleted file mode 100644
index d42f66fdec8ca3d6766c867573428af3cf479dfd..0000000000000000000000000000000000000000
--- a/chrome/browser/extensions/api/storage/local_storage_backend.h
+++ /dev/null
@@ -1,47 +0,0 @@
-// 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_STORAGE_BACKEND_H_
-#define CHROME_BROWSER_EXTENSIONS_API_STORAGE_LOCAL_STORAGE_BACKEND_H_
-
-#include <map>
-#include <string>
-
-#include "base/memory/linked_ptr.h"
-#include "base/memory/ref_counted.h"
-#include "chrome/browser/extensions/api/storage/settings_backend.h"
-#include "chrome/browser/extensions/api/storage/settings_storage_quota_enforcer.h"
-
-namespace base {
-class FilePath;
-}
-
-class ValueStore;
-
-namespace extensions {
-class SettingStorageFactory;
-
-class LocalStorageBackend : public SettingsBackend {
- public:
-  LocalStorageBackend(
-      const scoped_refptr<SettingsStorageFactory>& storage_factory,
-      const base::FilePath& base_path,
-      const SettingsStorageQuotaEnforcer::Limits& quota);
-  virtual ~LocalStorageBackend();
-
-  // SettingsBackend implementation.
-  virtual ValueStore* GetStorage(const std::string& extension_id) OVERRIDE;
-  virtual void DeleteStorage(const std::string& extension_id) OVERRIDE;
-
- private:
-  typedef std::map<std::string, linked_ptr<ValueStore> > StorageMap;
-
-  StorageMap storage_map_;
-
-  DISALLOW_COPY_AND_ASSIGN(LocalStorageBackend);
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_API_STORAGE_LOCAL_STORAGE_BACKEND_H_