Reland: Don't store ScriptValue in PopStateEvent

third_party/WebKit/Source/bindings/core/v8/custom/V8PopStateEventCustom.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 59 matching lines @@
 
   PopStateEvent* event = V8PopStateEvent::toImpl(info.Holder());
   History* history = event->GetHistory();
   if (!history || !event->SerializedState()) {
     // If the event doesn't have serializedState(), it means that the
     // event was initialized with PopStateEventInit. In such case, we need
     // to get a v8 value for the current world from state().
     if (event->SerializedState())
       result = event->SerializedState()->Deserialize(isolate);
     else
-      result = event->state().V8ValueFor(script_state);
+      result = event->state(script_state).V8Value();
     if (result.IsEmpty())
       result = v8::Null(isolate);
     V8SetReturnValue(info, CacheState(script_state, info.Holder(), result));
     return;
   }
 
   // There's no cached value from a previous invocation, nor a state value was
   // provided by the event, but there is a history object, so first we need to
   // see if the state object has been deserialized through the history object
   // already.
@@ skipping 19 matching lines @@
     result = event->SerializedState()->Deserialize(isolate);
     history_state.Set(v8_history, result);
   } else {
     result = event->SerializedState()->Deserialize(isolate);
   }
 
   V8SetReturnValue(info, CacheState(script_state, info.Holder(), result));
 }
 
 }  // namespace blink