Add 'didDispatchPingLoader' callback to FrameLoaderClient.

public/testing/WebFrameTestProxy.h

Index: public/testing/WebFrameTestProxy.h
diff --git a/public/testing/WebFrameTestProxy.h b/public/testing/WebFrameTestProxy.h
index 78eda03cd8ef5f2b2d451e376e08a5e34faa6d6e..666842d84ed285a9221b962bdb304e3e1b5d2556 100644
--- a/public/testing/WebFrameTestProxy.h
+++ b/public/testing/WebFrameTestProxy.h
@@ -120,6 +120,13 @@ public:
         m_baseProxy->didDetectXSS(frame, insecureURL, didBlockEntirePage);
         Base::didDetectXSS(frame, insecureURL, didBlockEntirePage);
     }
+    virtual void didDispatchPingLoader(WebKit::WebFrame* frame, const WebKit::WebURL& url)
+    {
+        // This is not implemented in RenderFrameImpl, so need to explicitly call
+        // into the base proxy.
+        m_baseProxy->didDispatchPingLoader(frame, url);
+        Base::didDispatchPingLoader(frame, url);
+    }
     virtual void willRequestResource(WebKit::WebFrame* frame, const WebKit::WebCachedURLRequest& request)
     {
         // This is not implemented in RenderFrameImpl, so need to explicitly call