Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/page/EventSource.cpp

Index: third_party/WebKit/Source/core/page/EventSource.cpp
diff --git a/third_party/WebKit/Source/core/page/EventSource.cpp b/third_party/WebKit/Source/core/page/EventSource.cpp
index 1d9bc233cfe4259a648e6cdc08d1096c4459f01f..030739cd207a026cc69c20555eb3ee4c225b4260 100644
--- a/third_party/WebKit/Source/core/page/EventSource.cpp
+++ b/third_party/WebKit/Source/core/page/EventSource.cpp
@@ -317,7 +317,7 @@ void EventSource::didFailRedirectCheck()
 
 void EventSource::onMessageEvent(const AtomicString& eventType, const String& data, const AtomicString& lastEventId)
 {
-    RefPtrWillBeRawPtr<MessageEvent> e = MessageEvent::create();
+    RawPtr<MessageEvent> e = MessageEvent::create();
     e->initMessageEvent(eventType, false, false, SerializedScriptValueFactory::instance().create(data), m_eventStreamOrigin, lastEventId, 0, nullptr);
 
     InspectorInstrumentation::willDispatchEventSourceEvent(getExecutionContext(), this, eventType, lastEventId, data);