Oilpan: Remove ref counting from EventTarget and all uses of Pass/RefPtr<EventTarget>.

Source/modules/indexeddb/IDBRequest.cpp

Index: Source/modules/indexeddb/IDBRequest.cpp
diff --git a/Source/modules/indexeddb/IDBRequest.cpp b/Source/modules/indexeddb/IDBRequest.cpp
index 7bf038fca093d0cd472f907cf310d912814f9ca1..22154653e3024f9951d53fea1d99fcc2e9a91c97 100644
--- a/Source/modules/indexeddb/IDBRequest.cpp
+++ b/Source/modules/indexeddb/IDBRequest.cpp
@@ -436,7 +436,7 @@ bool IDBRequest::dispatchEvent(PassRefPtrWillBeRawPtr<Event> event)
         m_readyState = DONE;
     dequeueEvent(event.get());
 
-    Vector<RefPtr<EventTarget> > targets;
+    WillBeHeapVector<RefPtrWillBeMember<EventTarget> > targets;
     targets.append(this);
     if (m_transaction && !m_preventPropagation) {
         targets.append(m_transaction);