Oilpan: Replace most of RefPtrs for Event objects with oilpan's transition types

Source/core/html/HTMLFormElement.cpp

Index: Source/core/html/HTMLFormElement.cpp
diff --git a/Source/core/html/HTMLFormElement.cpp b/Source/core/html/HTMLFormElement.cpp
index 806610fefecc0bc07bca1908c800eaff85e547df..83774823814a3aff73a59319fe0b62f6dcaa4f89 100644
--- a/Source/core/html/HTMLFormElement.cpp
+++ b/Source/core/html/HTMLFormElement.cpp
@@ -447,7 +447,7 @@ void HTMLFormElement::requestAutocomplete()
 
 void HTMLFormElement::finishRequestAutocomplete(AutocompleteResult result)
 {
-    RefPtr<Event> event;
+    RefPtrWillBeRawPtr<Event> event;
     if (result == AutocompleteResultSuccess)
         event = Event::create(EventTypeNames::autocomplete);
     else if (result == AutocompleteResultErrorDisabled)
@@ -467,7 +467,7 @@ void HTMLFormElement::finishRequestAutocomplete(AutocompleteResult result)
 
 void HTMLFormElement::requestAutocompleteTimerFired(Timer<HTMLFormElement>*)
 {
-    Vector<RefPtr<Event> > pendingEvents;
+    WillBeHeapVector<RefPtrWillBeMember<Event> > pendingEvents;
     m_pendingAutocompleteEvents.swap(pendingEvents);
     for (size_t i = 0; i < pendingEvents.size(); ++i)
         dispatchEvent(pendingEvents[i].release());