Oilpan: Reduce RefPtr to WorkerGlobalScope.

Source/core/events/MessageEvent.h

Index: Source/core/events/MessageEvent.h
diff --git a/Source/core/events/MessageEvent.h b/Source/core/events/MessageEvent.h
index 081f2d6d3b5492676f93b6e69d9319daef3702ba..ec2ebe8a0f5589135caeed2ff460c0f8c6ee8739 100644
--- a/Source/core/events/MessageEvent.h
+++ b/Source/core/events/MessageEvent.h
@@ -53,15 +53,15 @@ public:
     {
         return adoptRefWillBeNoop(new MessageEvent);
     }
-    static PassRefPtrWillBeRawPtr<MessageEvent> create(PassOwnPtr<MessagePortArray> ports, const String& origin = String(), const String& lastEventId = String(), PassRefPtr<EventTarget> source = nullptr)
+    static PassRefPtrWillBeRawPtr<MessageEvent> create(PassOwnPtr<MessagePortArray> ports, const String& origin = String(), const String& lastEventId = String(), PassRefPtrWillBeRawPtr<EventTarget> source = nullptr)
     {
         return adoptRefWillBeNoop(new MessageEvent(origin, lastEventId, source, ports));
     }
-    static PassRefPtrWillBeRawPtr<MessageEvent> create(PassOwnPtr<MessagePortArray> ports, PassRefPtr<SerializedScriptValue> data, const String& origin = String(), const String& lastEventId = String(), PassRefPtr<EventTarget> source = nullptr)
+    static PassRefPtrWillBeRawPtr<MessageEvent> create(PassOwnPtr<MessagePortArray> ports, PassRefPtr<SerializedScriptValue> data, const String& origin = String(), const String& lastEventId = String(), PassRefPtrWillBeRawPtr<EventTarget> source = nullptr)
     {
         return adoptRefWillBeNoop(new MessageEvent(data, origin, lastEventId, source, ports));
     }
-    static PassRefPtrWillBeRawPtr<MessageEvent> create(PassOwnPtr<MessagePortChannelArray> channels, PassRefPtr<SerializedScriptValue> data, const String& origin = String(), const String& lastEventId = String(), PassRefPtr<EventTarget> source = nullptr)
+    static PassRefPtrWillBeRawPtr<MessageEvent> create(PassOwnPtr<MessagePortChannelArray> channels, PassRefPtr<SerializedScriptValue> data, const String& origin = String(), const String& lastEventId = String(), PassRefPtrWillBeRawPtr<EventTarget> source = nullptr)
     {
         return adoptRefWillBeNoop(new MessageEvent(data, origin, lastEventId, source, channels));
     }
@@ -118,9 +118,9 @@ public:
 private:
     MessageEvent();
     MessageEvent(const AtomicString&, const MessageEventInit&);
-    MessageEvent(const String& origin, const String& lastEventId, PassRefPtr<EventTarget> source, PassOwnPtr<MessagePortArray>);
-    MessageEvent(PassRefPtr<SerializedScriptValue> data, const String& origin, const String& lastEventId, PassRefPtr<EventTarget> source, PassOwnPtr<MessagePortArray>);
-    MessageEvent(PassRefPtr<SerializedScriptValue> data, const String& origin, const String& lastEventId, PassRefPtr<EventTarget> source, PassOwnPtr<MessagePortChannelArray>);
+    MessageEvent(const String& origin, const String& lastEventId, PassRefPtrWillBeRawPtr<EventTarget> source, PassOwnPtr<MessagePortArray>);
+    MessageEvent(PassRefPtr<SerializedScriptValue> data, const String& origin, const String& lastEventId, PassRefPtrWillBeRawPtr<EventTarget> source, PassOwnPtr<MessagePortArray>);
+    MessageEvent(PassRefPtr<SerializedScriptValue> data, const String& origin, const String& lastEventId, PassRefPtrWillBeRawPtr<EventTarget> source, PassOwnPtr<MessagePortChannelArray>);
 
     explicit MessageEvent(const String& data, const String& origin);
     explicit MessageEvent(PassRefPtrWillBeRawPtr<Blob> data, const String& origin);
@@ -133,7 +133,7 @@ private:
     RefPtr<ArrayBuffer> m_dataAsArrayBuffer;
     String m_origin;
     String m_lastEventId;
-    RefPtr<EventTarget> m_source;
+    RefPtrWillBeMember<EventTarget> m_source;
     // m_ports are the MessagePorts in an engtangled state, and m_channels are
     // the MessageChannels in a disentangled state. Only one of them can be
     // non-empty at a time. entangleMessagePorts() moves between the states.