Always enable Oilpan for EventSource.

Source/core/page/EventSource.cpp

 /*
  * Copyright (C) 2009, 2012 Ericsson AB. All rights reserved.
  * Copyright (C) 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2011, Code Aurora Forum. 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
@@ skipping 56 matching lines @@
     , m_withCredentials(eventSourceInit.withCredentials())
     , m_state(CONNECTING)
     , m_decoder(TextResourceDecoder::create("text/plain", "UTF-8"))
     , m_connectTimer(this, &EventSource::connectTimerFired)
     , m_discardTrailingNewline(false)
     , m_requestInFlight(false)
     , m_reconnectDelay(defaultReconnectDelay)
 {
 }
 
-PassRefPtrWillBeRawPtr<EventSource> EventSource::create(ExecutionContext* context, const String& url, const EventSourceInit& eventSourceInit, ExceptionState& exceptionState)
+EventSource* EventSource::create(ExecutionContext* context, const String& url, const EventSourceInit& eventSourceInit, ExceptionState& exceptionState)
 {
     if (url.isEmpty()) {
         exceptionState.throwDOMException(SyntaxError, "Cannot open an EventSource to an empty URL.");
         return nullptr;
     }
 
     KURL fullURL = context->completeURL(url);
     if (!fullURL.isValid()) {
         exceptionState.throwDOMException(SyntaxError, "Cannot open an EventSource to '" + url + "'. The URL is invalid.");
         return nullptr;
     }
 
     // FIXME: Convert this to check the isolated world's Content Security Policy once webkit.org/b/104520 is solved.
     if (!ContentSecurityPolicy::shouldBypassMainWorld(context) && !context->contentSecurityPolicy()->allowConnectToSource(fullURL)) {
         // We can safely expose the URL to JavaScript, as this exception is generate synchronously before any redirects take place.
         exceptionState.throwSecurityError("Refused to connect to '" + fullURL.elidedString() + "' because it violates the document's Content Security Policy.");
         return nullptr;
     }
 
-    RefPtrWillBeRawPtr<EventSource> source = adoptRefWillBeNoop(new EventSource(context, fullURL, eventSourceInit));
+    EventSource* source = new EventSource(context, fullURL, eventSourceInit);
 
     source->scheduleInitialConnect();
     source->suspendIfNeeded();
-
-    return source.release();
+    return source;
 }
 
 EventSource::~EventSource()
 {
     ASSERT(m_state == CLOSED);
     ASSERT(!m_requestInFlight);
 }
 
 void EventSource::scheduleInitialConnect()
 {
@@ skipping 304 matching lines @@
                 if (ok)
                     m_reconnectDelay = retry;
             }
         }
     }
 }
 
 void EventSource::stop()
 {
     close();
+
+    // (Non)Oilpan: In order to make Worker shutdowns clean,
+    // deref the loader. This will in turn deref its
+    // RefPtr<WorkerGlobalScope>.
+    //
+    // Worth doing regardless, it is no longer of use.
+    m_loader = nullptr;
 }
 
 bool EventSource::hasPendingActivity() const
 {
     return m_state != CLOSED;
 }
 
 PassRefPtrWillBeRawPtr<MessageEvent> EventSource::createMessageEvent()
 {
     RefPtrWillBeRawPtr<MessageEvent> event = MessageEvent::create();
     event->initMessageEvent(m_eventName.isEmpty() ? EventTypeNames::message : m_eventName, false, false, SerializedScriptValueFactory::instance().create(String(m_data)), m_eventStreamOrigin, m_lastEventId, 0, nullptr);
     m_data.clear();
     return event.release();
 }
 
 DEFINE_TRACE(EventSource)
 {
-    EventTargetWithInlineData::trace(visitor);
+    RefCountedGarbageCollectedEventTargetWithInlineData::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
 } // namespace blink