Add 'didDispatchPingLoader' callback to FrameLoaderClient.

Source/core/loader/EmptyClients.h

 /*
  * Copyright (C) 2006 Eric Seidel (eric@webkit.org)
  * Copyright (C) 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2012 Samsung Electronics. 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 216 matching lines @@
 
     virtual String doNotTrackValue() OVERRIDE { return String(); }
 
     virtual void transitionToCommittedForNewPage() OVERRIDE { }
 
     virtual bool shouldGoToHistoryItem(HistoryItem*) const OVERRIDE { return false; }
     virtual bool shouldStopLoadingForHistoryItem(HistoryItem*) const OVERRIDE { return false; }
     virtual void didDisplayInsecureContent() OVERRIDE { }
     virtual void didRunInsecureContent(SecurityOrigin*, const KURL&) OVERRIDE { }
     virtual void didDetectXSS(const KURL&, bool) OVERRIDE { }
+    virtual void didDispatchPingLoader(const KURL&) OVERRIDE { }
     virtual PassRefPtr<Frame> createFrame(const KURL&, const String&, HTMLFrameOwnerElement*, const String&, bool, int, int) OVERRIDE;
     virtual PassRefPtr<Widget> createPlugin(const IntSize&, HTMLPlugInElement*, const KURL&, const Vector<String>&, const Vector<String>&, const String&, bool) OVERRIDE;
     virtual PassRefPtr<Widget> createJavaAppletWidget(const IntSize&, HTMLAppletElement*, const KURL&, const Vector<String>&, const Vector<String>&) OVERRIDE;
 
     virtual ObjectContentType objectContentType(const KURL&, const String&, bool) OVERRIDE { return ObjectContentType(); }
 
     virtual void dispatchDidClearWindowObjectInWorld(DOMWrapperWorld*) OVERRIDE { }
     virtual void documentElementAvailable() OVERRIDE { }
 
     virtual void didCreateScriptContext(v8::Handle<v8::Context>, int extensionGroup, int worldId) OVERRIDE { }
@@ skipping 120 matching lines @@
     virtual int forwardListCount() OVERRIDE { return 0; }
     virtual bool isActive() OVERRIDE { return false; }
     virtual void close() OVERRIDE { }
 };
 
 void fillWithEmptyClients(Page::PageClients&);
 
 }
 
 #endif // EmptyClients_h