Moved serialization out of CRWSessionEntry.

ios/web/navigation/navigation_manager_storage_builder.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_NAVIGATION_MANAGER_BUILDER_H_
 #define IOS_WEB_NAVIGATION_SERIALIZED_NAVIGATION_MANAGER_BUILDER_H_
 
 #include <memory>
 
 @class CRWNavigationManagerStorage;
 
 namespace web {
 
 class NavigationManagerImpl;
 
 // Class that can serialize and deserialize NavigationManagers.
 class NavigationManagerStorageBuilder {
  public:
   // Creates a serialized NavigationManager from |navigation_manager|.
-  CRWNavigationManagerStorage* BuildSerialization(
+  CRWNavigationManagerStorage* BuildStorage(
       NavigationManagerImpl* navigation_manager) const;
   // Creates a NavigationManager from |navigation_manager_storage|.
   std::unique_ptr<NavigationManagerImpl> BuildNavigationManagerImpl(
       CRWNavigationManagerStorage* navigation_manager_storage) const;
 };
 
 }  // namespace web
 
 #endif  // IOS_WEB_NAVIGATION_SERIALIZED_NAVIGATION_MANAGER_BUILDER_H_