Observing DocumentTiming and sending data to RenderFrameImpl

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 436 matching lines @@
     // script) from an insecure source.  Note that the insecure content can
     // spread to other frames in the same origin.
     virtual void didRunInsecureContent(WebLocalFrame*, const WebSecurityOrigin&, const WebURL& insecureURL) { }
 
     // A reflected XSS was encountered in the page and suppressed.
     virtual void didDetectXSS(WebLocalFrame*, const WebURL&, bool didBlockEntirePage) { }
 
     // A PingLoader was created, and a request dispatched to a URL.
     virtual void didDispatchPingLoader(WebLocalFrame*, const WebURL&) { }
 
+    // A Performance Event (e.g. First Paint) occurred

[Bryan McQuade, 2015/08/14 15:14:16]

maybe just add 'timing' to the sentence : 'A performance timing event (e.g.
first paint) occurred.'

+    virtual void didChangePerformanceTiming() { }
+
     // The loaders in this frame have been stopped.
     virtual void didAbortLoading(WebLocalFrame*) { }
 
 
     // Script notifications ------------------------------------------------
 
     // 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(WebLocalFrame*, v8::Local<v8::Context>, int extensionGroup, int worldId) { }
@@ skipping 211 matching lines @@
     // WebUSB --------------------------------------------------------------
     virtual WebUSBClient* usbClient() { return nullptr; }
 
 protected:
     virtual ~WebFrameClient() { }
 };
 
 } // namespace blink
 
 #endif