Created SerializedUserDataManager.

ios/web/navigation/serialized_user_data_manager_impl.h

+// Copyright 2015 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 IOS_WEB_NAVIGATION_SERIALIZED_USER_DATA_MANAGER_IMPL_H_
+#define IOS_WEB_NAVIGATION_SERIALIZED_USER_DATA_MANAGER_IMPL_H_
+
+#import <Foundation/Foundation.h>
+
+#include "base/mac/scoped_nsobject.h"
+#include "ios/web/public/serialized_user_data_manager.h"
+
+namespace web {
+
+class SerializedUserDataManagerImpl : public SerializedUserDataManager {
+ public:
+  SerializedUserDataManagerImpl();
+  ~SerializedUserDataManagerImpl() override;
+
+  // SerializedUserDataManager:
+  void SetValueForSerializationKey(SerializedUserDataType data,
+                                   NSString* serialization_key) override;
+  SerializedUserDataType GetValueForSerializationKey(
+      NSString* serialization_key) const override;
+  NSDictionary* GetSerializationDictionary() const override;
+  void AddValuesFromDictionary(NSDictionary* dictionary) override;
+
+ private:
+  // The dictionary holding serializable user data.
+  base::scoped_nsobject<NSMutableDictionary> user_data_;
+};
+
+}  // namespace web
+
+#endif  // IOS_WEB_NAVIGATION_SERIALIZED_USER_DATA_MANAGER_IMPL_H_