Remove dead DocumentState metrics tracking code

third_party/WebKit/Source/core/loader/FrameLoader.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights
  * reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2008 Alp Toker <alp@atoker.com>
  * Copyright (C) Research In Motion Limited 2009. All rights reserved.
  * Copyright (C) 2011 Kris Jordan <krisjordan@gmail.com>
  * Copyright (C) 2011 Google Inc. All rights reserved.
@@ skipping 1659 matching lines @@
   m_checkTimer.stop();
 
   m_loadType = type;
 
   if (frameLoadRequest.form())
     client()->dispatchWillSubmitForm(frameLoadRequest.form());
 
   m_progressTracker->progressStarted();
   m_provisionalDocumentLoader->appendRedirect(
       m_provisionalDocumentLoader->request().url());
-  double triggeringEventTime =
-      frameLoadRequest.triggeringEvent()
-          ? frameLoadRequest.triggeringEvent()->platformTimeStamp()
-          : 0;
-  client()->dispatchDidStartProvisionalLoad(triggeringEventTime);
+  client()->dispatchDidStartProvisionalLoad();
   DCHECK(m_provisionalDocumentLoader);
   m_provisionalDocumentLoader->startLoadingMainResource();
 
   takeObjectSnapshot();
 }
 
 void FrameLoader::applyUserAgent(ResourceRequest& request) {
   String userAgent = this->userAgent();
   DCHECK(!userAgent.isNull());
   request.setHTTPUserAgent(AtomicString(userAgent));
@@ skipping 232 matching lines @@
                          m_documentLoader ? m_documentLoader->url() : String());
   return tracedValue;
 }
 
 inline void FrameLoader::takeObjectSnapshot() const {
   TRACE_EVENT_OBJECT_SNAPSHOT_WITH_ID("loading", "FrameLoader", this,
                                       toTracedValue());
 }
 
 }  // namespace blink