Add 'didDispatchPingLoader' callback to FrameLoaderClient.

public/web/WebFrameClient.h

 /*
  * Copyright (C) 2011, 2012 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 235 matching lines @@
     virtual void didDisplayInsecureContent(WebFrame*) { }
 
     // The indicated security origin has run active content (such as a
     // script) from an insecure source.  Note that the insecure content can
     // spread to other frames in the same origin.
     virtual void didRunInsecureContent(WebFrame*, const WebSecurityOrigin&, const WebURL& insecureURL) { }
 
     // A reflected XSS was encountered in the page and suppressed.
     virtual void didDetectXSS(WebFrame*, const WebURL&, bool didBlockEntirePage) { }
 
+    // A PingLoader was created, and a request dispatched to a URL.
+    virtual void didDispatchPingLoader(WebFrame*, const WebURL&) { }
+
     // Script notifications ------------------------------------------------
 
     // Script in the page tried to allocate too much memory.
     virtual void didExhaustMemoryAvailableForScript(WebFrame*) { }
 
     // Notifies that a new script context has been created for this frame.
     // This is similar to didClearWindowObject but only called once per
     // frame context.
     virtual void didCreateScriptContext(WebFrame*, v8::Handle<v8::Context>, int extensionGroup, int worldId) { }
 
@@ skipping 118 matching lines @@
     // Extensions3D.h in WebCore/platform/graphics).
     virtual void didLoseWebGLContext(WebFrame*, int) { }
 
 protected:
     ~WebFrameClient() { }
 };
 
 } // namespace WebKit
 
 #endif