Report nav timing 2 instance as soon as it's requested.

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

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2011 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 50 matching lines @@
 #include "platform/HTTPNames.h"
 #include "platform/UserGestureIndicator.h"
 #include "platform/loader/fetch/FetchInitiatorTypeNames.h"
 #include "platform/loader/fetch/FetchRequest.h"
 #include "platform/loader/fetch/FetchUtils.h"
 #include "platform/loader/fetch/MemoryCache.h"
 #include "platform/loader/fetch/ResourceFetcher.h"
 #include "platform/mhtml/ArchiveResource.h"
 #include "platform/network/ContentSecurityPolicyResponseHeaders.h"
 #include "platform/network/HTTPParsers.h"
+#include "platform/network/ResourceTimingInfo.h"
 #include "platform/network/mime/MIMETypeRegistry.h"
 #include "platform/plugins/PluginData.h"
 #include "platform/weborigin/SchemeRegistry.h"
 #include "platform/weborigin/SecurityPolicy.h"
 #include "public/platform/Platform.h"
 #include "public/platform/modules/serviceworker/WebServiceWorkerNetworkProvider.h"
 #include "wtf/Assertions.h"
 #include "wtf/AutoReset.h"
 #include "wtf/text/WTFString.h"
 
@@ skipping 78 matching lines @@
   visitor->trace(m_applicationCacheHost);
   visitor->trace(m_contentSecurityPolicy);
   RawResourceClient::trace(visitor);
 }
 
 unsigned long DocumentLoader::mainResourceIdentifier() const {
   return m_mainResource ? m_mainResource->identifier() : 0;
 }
 
 ResourceTimingInfo* DocumentLoader::getNavigationTimingInfo() const {
+  DCHECK(fetcher());
   return fetcher()->getNavigationTimingInfo();
 }
 
 const ResourceRequest& DocumentLoader::originalRequest() const {
   return m_originalRequest;
 }
 
 const ResourceRequest& DocumentLoader::getRequest() const {
   return m_request;
 }
@@ skipping 639 matching lines @@
                              m_writer ? m_writer->encoding() : emptyAtom, true,
                              ForceSynchronousParsing);
   if (!source.isNull())
     m_writer->appendReplacingData(source);
   endWriting();
 }
 
 DEFINE_WEAK_IDENTIFIER_MAP(DocumentLoader);
 
 }  // namespace blink