Revert of Use trace wrapper in PopStateEvent

third_party/WebKit/Source/core/events/PopStateEvent.cpp

Index: third_party/WebKit/Source/core/events/PopStateEvent.cpp
diff --git a/third_party/WebKit/Source/core/events/PopStateEvent.cpp b/third_party/WebKit/Source/core/events/PopStateEvent.cpp
index 47640bc95ab3784e1d669d2ccf092e3d4e6382e2..e56e126831aa9b8a4b4b7f65354e09f29a7f06b8 100644
--- a/third_party/WebKit/Source/core/events/PopStateEvent.cpp
+++ b/third_party/WebKit/Source/core/events/PopStateEvent.cpp
@@ -32,40 +32,22 @@
 namespace blink {
 
 PopStateEvent::PopStateEvent()
-    : serialized_state_(nullptr), state_(this), history_(nullptr) {}
+    : serialized_state_(nullptr), history_(nullptr) {}
 
-PopStateEvent::PopStateEvent(ScriptState* script_state,
-                             const AtomicString& type,
+PopStateEvent::PopStateEvent(const AtomicString& type,
                              const PopStateEventInit& initializer)
-    : Event(type, initializer), state_(this), history_(nullptr) {
-  if (initializer.hasState()) {
-    world_ = RefPtr<DOMWrapperWorld>(script_state->World());
-    state_.Set(initializer.state().GetIsolate(), initializer.state().V8Value());
-  }
+    : Event(type, initializer), history_(nullptr) {
+  if (initializer.hasState())
+    state_ = initializer.state();
 }
 
 PopStateEvent::PopStateEvent(PassRefPtr<SerializedScriptValue> serialized_state,
                              History* history)
     : Event(EventTypeNames::popstate, false, true),
       serialized_state_(std::move(serialized_state)),
-      state_(this),
       history_(history) {}
 
 PopStateEvent::~PopStateEvent() {}
-
-ScriptValue PopStateEvent::state(ScriptState* script_state) const {
-  if (state_.IsEmpty())
-    return ScriptValue();
-
-  v8::Isolate* isolate = script_state->GetIsolate();
-  if (world_->GetWorldId() != script_state->World().GetWorldId()) {
-    v8::Local<v8::Value> value = state_.NewLocal(isolate);
-    RefPtr<SerializedScriptValue> serialized =
-        SerializedScriptValue::SerializeAndSwallowExceptions(isolate, value);
-    return ScriptValue(script_state, serialized->Deserialize(isolate));
-  }
-  return ScriptValue(script_state, state_.NewLocal(isolate));
-}
 
 PopStateEvent* PopStateEvent::Create() {
   return new PopStateEvent;
@@ -77,10 +59,9 @@
   return new PopStateEvent(std::move(serialized_state), history);
 }
 
-PopStateEvent* PopStateEvent::Create(ScriptState* script_state,
-                                     const AtomicString& type,
+PopStateEvent* PopStateEvent::Create(const AtomicString& type,
                                      const PopStateEventInit& initializer) {
-  return new PopStateEvent(script_state, type, initializer);
+  return new PopStateEvent(type, initializer);
 }
 
 const AtomicString& PopStateEvent::InterfaceName() const {
@@ -92,9 +73,4 @@
   Event::Trace(visitor);
 }
 
-DEFINE_TRACE_WRAPPERS(PopStateEvent) {
-  visitor->TraceWrappers(state_);
-  Event::TraceWrappers(visitor);
-}
-
 }  // namespace blink