[rAc - libaddressinput] slay another helper class

third_party/libaddressinput/chromium/cpp/src/validating_storage.h

-// Copyright (C) 2013 Google Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// A wrapper object for Storage that stores data with a checksum and a
-// timestamp. The existence of checksum and timestamp fields is transparent to
-// the user of the object.
-
-#ifndef I18N_ADDRESSINPUT_VALIDATING_STORAGE_H_
-#define I18N_ADDRESSINPUT_VALIDATING_STORAGE_H_
-
-#include <libaddressinput/storage.h>
-#include <libaddressinput/util/basictypes.h>
-#include <libaddressinput/util/scoped_ptr.h>
-
-#include <string>
-
-namespace i18n {
-namespace addressinput {
-
-// Wraps Storage to add checksum and timestamp to stored data. Sample usage:
-//    Storage file_storage = ...;
-//    scoped_ptr<Storage> storage(new ValidatingStorage(file_storage.Pass()));
-//    storage->Put("key", "data");
-//    storage->Get("key", BuildCallback(this, &MyClass::OnDataReady));
-class ValidatingStorage : public Storage {
- public:
-  explicit ValidatingStorage(scoped_ptr<Storage> storage);
-  virtual ~ValidatingStorage();
-
-  // Storage implementation.
-  virtual void Put(const std::string& key, const std::string& data);
-  virtual void Get(const std::string& key, scoped_ptr<Callback> data_ready)
-      const;
-
- private:
-  // The storage being wrapped.
-  scoped_ptr<Storage> wrapped_storage_;
-
-  DISALLOW_COPY_AND_ASSIGN(ValidatingStorage);
-};
-
-}  // namespace addressinput
-}  // namespace i18n
-
-#endif  // I18N_ADDRESSINPUT_VALIDATING_STORAGE_H_