Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/modules/indexeddb/IDBEventDispatcher.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 24 matching lines @@
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class Event;
 
 class IDBEventDispatcher {
     STATIC_ONLY(IDBEventDispatcher);
 public:
-    static DispatchEventResult dispatch(Event*, WillBeHeapVector<RefPtrWillBeMember<EventTarget>>&); // The target first and then its ancestors in order of how the event bubbles.
+    static DispatchEventResult dispatch(Event*, HeapVector<Member<EventTarget>>&); // The target first and then its ancestors in order of how the event bubbles.
 };
 
 } // namespace blink
 
 #endif // IDBEventDispatcher_h