Created SerializableUserDataManager.

ios/web/navigation/session_storage_builder.h

Index: ios/web/navigation/session_storage_builder.h
diff --git a/ios/web/navigation/session_storage_builder.h b/ios/web/navigation/session_storage_builder.h
new file mode 100644
index 0000000000000000000000000000000000000000..4f4c2b9d1f8c706ac6771dfae91009199c8669dc
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+++ b/ios/web/navigation/session_storage_builder.h
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+// 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_NAVIGATION_MANAGER_BUILDER_H_
+#define IOS_WEB_NAVIGATION_SERIALIZED_NAVIGATION_MANAGER_BUILDER_H_
+
+#include <memory>
+
+@class CRWSessionStorage;
+
+namespace web {
+
+class WebStateImpl;
+
+// Class that can serialize and deserialize session information.
+class SessionStorageBuilder {
+ public:
+  // Creates a serializable session storage from |web_state|.
+  CRWSessionStorage* BuildStorage(WebStateImpl* web_state) const;
+  // Populates |web_state| with |storage|'s session information.
+  void ExtractSessionState(WebStateImpl* web_state,
+                           CRWSessionStorage* storage) const;
+};
+
+}  // namespace web
+
+#endif  // IOS_WEB_NAVIGATION_SERIALIZED_NAVIGATION_MANAGER_BUILDER_H_