Add a warning whenever link preloads are not used

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

 /*
  * Copyright (C) 2013 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 636 matching lines @@
         return false;
     info->setInitiatorType(frame()->deprecatedLocalOwner()->localName());
     return true;
 }
 
 void FrameFetchContext::sendImagePing(const KURL& url)
 {
     PingLoader::loadImage(frame(), url);
 }
 
-void FrameFetchContext::addConsoleMessage(const String& message) const
+void FrameFetchContext::addConsoleMessage(const String& message, LogMessageType messageType) const
 {
+    MessageLevel level = ErrorMessageLevel;
+    if (messageType == LogWarningMessage)
+        level = WarningMessageLevel;
     if (frame()->document())
-        frame()->document()->addConsoleMessage(ConsoleMessage::create(JSMessageSource, ErrorMessageLevel, message));
+        frame()->document()->addConsoleMessage(ConsoleMessage::create(JSMessageSource, level, message));
 }
 
 SecurityOrigin* FrameFetchContext::getSecurityOrigin() const
 {
     return m_document ? m_document->getSecurityOrigin() : nullptr;
 }
 
 void FrameFetchContext::upgradeInsecureRequest(ResourceRequest& resourceRequest)
 {
     frame()->loader().upgradeInsecureRequest(resourceRequest, m_document);
@@ skipping 129 matching lines @@
 }
 
 DEFINE_TRACE(FrameFetchContext)
 {
     visitor->trace(m_document);
     visitor->trace(m_documentLoader);
     FetchContext::trace(visitor);
 }
 
 } // namespace blink