InlinedVisitor: Migrate page to use inlined tracing

Source/core/page/EventSource.h

 /*
  * Copyright (C) 2009, 2012 Ericsson AB. All rights reserved.
  * Copyright (C) 2010 Apple 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.
@@ skipping 72 matching lines @@
     // ActiveDOMObject
     //
     // Note: suspend() is noop since ScopedPageLoadDeferrer calls
     // Page::setDefersLoading() and it defers delivery of events from the
     // loader, and therefore the methods of this class for receiving
     // asynchronous events from the loader won't be invoked.
     virtual void stop() override;
 
     virtual bool hasPendingActivity() const override;
 
-    virtual void trace(Visitor*) override;
+    DECLARE_VIRTUAL_TRACE();
 
 private:
     EventSource(ExecutionContext*, const KURL&, const EventSourceInit&);
 
     virtual void didReceiveResponse(unsigned long, const ResourceResponse&, PassOwnPtr<WebDataConsumerHandle>) override;
     virtual void didReceiveData(const char*, unsigned) override;
     virtual void didFinishLoading(unsigned long, double) override;
     virtual void didFail(const ResourceError&) override;
     virtual void didFailAccessControlCheck(const ResourceError&) override;
     virtual void didFailRedirectCheck() override;
@@ skipping 23 matching lines @@
     Vector<UChar> m_data;
     AtomicString m_currentlyParsedEventId;
     AtomicString m_lastEventId;
     unsigned long long m_reconnectDelay;
     String m_eventStreamOrigin;
 };
 
 } // namespace blink
 
 #endif // EventSource_h