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

Source/modules/indexeddb/IDBEventDispatcher.h

Index: Source/modules/indexeddb/IDBEventDispatcher.h
diff --git a/Source/modules/indexeddb/IDBEventDispatcher.h b/Source/modules/indexeddb/IDBEventDispatcher.h
index 254055c68b8d7304081b37f7a1973473078ea5b7..86ed11102e1c54e97a46142bc8cf0f04471dbae9 100644
--- a/Source/modules/indexeddb/IDBEventDispatcher.h
+++ b/Source/modules/indexeddb/IDBEventDispatcher.h
@@ -29,6 +29,7 @@
 #ifndef IDBEventDispatcher_h
 #define IDBEventDispatcher_h
 
+#include "platform/heap/Handle.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 
@@ -39,7 +40,7 @@ class EventTarget;
 
 class IDBEventDispatcher {
 public:
-    static bool dispatch(Event*, Vector<RefPtr<EventTarget> >&); // The target first and then its ancestors in order of how the event bubbles.
+    static bool dispatch(Event*, WillBeHeapVector<RefPtrWillBeMember<EventTarget> >&); // The target first and then its ancestors in order of how the event bubbles.
 
 private:
     IDBEventDispatcher();