Move modules-dependent Event code out of core.

Source/core/dom/Document.cpp

Index: Source/core/dom/Document.cpp
diff --git a/Source/core/dom/Document.cpp b/Source/core/dom/Document.cpp
index b69cf2e04871d5bcbfef8fe95af8bd0c5ba78658..7346b86916380463af9abd7c1837af7a84f1045c 100644
--- a/Source/core/dom/Document.cpp
+++ b/Source/core/dom/Document.cpp
@@ -3919,9 +3919,6 @@ PassRefPtrWillBeRawPtr<Event> Document::createEvent(const String& eventType, Exc
     RefPtrWillBeRawPtr<Event> event = EventFactory::create(eventType);
     if (event)
         return event.release();
-    event = EventModulesFactory::create(eventType); // TODO: move this to modules http://crbug.com/358074
-    if (event)
-        return event.release();
 
     exceptionState.throwDOMException(NotSupportedError, "The provided event type ('" + eventType + "') is invalid.");
     return nullptr;