Make 'any'-typed attributes of events available in isolated worlds

Source/bindings/v8/custom/V8PopStateEventCustom.cpp

Index: Source/bindings/v8/custom/V8PopStateEventCustom.cpp
diff --git a/Source/bindings/v8/custom/V8PopStateEventCustom.cpp b/Source/bindings/v8/custom/V8PopStateEventCustom.cpp
index ba93201f6fbc55512f4108480b737ee5fc722a43..af14e0b84a8bbf4a842b6411189a2940e1e93358 100644
--- a/Source/bindings/v8/custom/V8PopStateEventCustom.cpp
+++ b/Source/bindings/v8/custom/V8PopStateEventCustom.cpp
@@ -58,7 +58,16 @@ void V8PopStateEvent::stateAttrGetterCustom(v8::Local<v8::String> name, const v8
     PopStateEvent* event = V8PopStateEvent::toNative(info.Holder());
     History* history = event->history();
     if (!history || !event->serializedState()) {
-        v8SetReturnValue(info, cacheState(info.Holder(), v8::Null(info.GetIsolate())));
+        if (!event->serializedState()) {
+            v8::Local<v8::Value> mainWorldState = getHiddenValueFromMainWorldWrapper(info.GetIsolate(), event, V8HiddenPropertyName::state());
+            if (!mainWorldState.IsEmpty())
+                event->setSerializedState(SerializedScriptValue::createSwallowExceptions(mainWorldState, info.GetIsolate()));
+        }
+        if (event->serializedState())
+            result = event->serializedState()->deserialize();
+        else
+            result = v8::Null(info.GetIsolate());
+        v8SetReturnValue(info, cacheState(info.Holder(), result));
         return;
     }
 
@@ -81,8 +90,9 @@ void V8PopStateEvent::stateAttrGetterCustom(v8::Local<v8::String> name, const v8
         }
         result = event->serializedState()->deserialize(info.GetIsolate());
         v8History->SetHiddenValue(V8HiddenPropertyName::state(), result);
-    } else
+    } else {
         result = event->serializedState()->deserialize(info.GetIsolate());
+    }
 
     v8SetReturnValue(info, cacheState(info.Holder(), result));
 }