Created SerializedUserDataManager.

ios/web/navigation/serialized_navigation_manager_builder.mm

Index: ios/web/navigation/serialized_navigation_manager_builder.mm
diff --git a/ios/web/navigation/serialized_navigation_manager_builder.mm b/ios/web/navigation/serialized_navigation_manager_builder.mm
index 972e1432cc7802ee3174fe350f77ea705665e74d..20fbd8004e94c9d5577ac232076930b89a2711bb 100644
--- a/ios/web/navigation/serialized_navigation_manager_builder.mm
+++ b/ios/web/navigation/serialized_navigation_manager_builder.mm
@@ -9,6 +9,7 @@
 #import "ios/web/navigation/crw_serialized_navigation_manager.h"
 #import "ios/web/navigation/crw_session_controller.h"
 #include "ios/web/navigation/navigation_manager_impl.h"
+#include "ios/web/public/serialized_user_data_manager.h"
 
 // CRWSessionController's readonly properties redefined as readwrite.  These
 // will be removed and NavigationManagerImpl's ivars will be written directly
@@ -54,6 +55,12 @@ SerializedNavigationManagerBuilder::FromNavigationManager(
       session_controller.sessionCertificatePolicyManager;
   serialized_navigation_manager.XCallbackParameters =
       session_controller.xCallbackParameters;
+  web::SerializedUserDataManager* userDataManager =
+      web::SerializedUserDataManager::FromWebState(
+          navigation_manager->GetWebState());
+  serialized_navigation_manager.serializedUserData =
+      userDataManager->GetSerializationDictionary();
+
   return serialized_navigation_manager;
 }
 
@@ -84,6 +91,11 @@ SerializedNavigationManagerBuilder::ToNavigationManager(
   scoped_ptr<NavigationManagerImpl> navigation_manager(
       new NavigationManagerImpl());
   navigation_manager->SetSessionController(session_controller);
+  web::SerializedUserDataManager* userDataManager =
+      web::SerializedUserDataManager::FromWebState(
+          navigation_manager->GetWebState());
+  userDataManager->AddValuesFromDictionary(
+      serialized_navigation_manager.serializedUserData);
   return navigation_manager.Pass();
 }