[NoStatePrefetch] Do not send responses to renderer in prefetch mode.

third_party/WebKit/Source/core/html/parser/HTMLDocumentParser.cpp

 /*
  * Copyright (C) 2010 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 806 matching lines @@
     ASSERT(!shouldUseThreading());
 
     TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("blink.debug"), "HTMLDocumentParser::append", "size", inputSource.length());
     const SegmentedString source(inputSource);
 
     if (document()->isPrefetchOnly()) {
         if (!m_preloadScanner)
             m_preloadScanner = createPreloadScanner();
 
         m_preloadScanner->appendToEnd(source);
-        // TODO(droger): Set the LOAD_PREFETCH flags on the requests.
         m_preloadScanner->scanAndPreload(m_preloader.get(), document()->validBaseElementURL(), nullptr);
 
         // Return after the preload scanner, do not actually parse the document.
         return;
     }
 
     if (m_preloadScanner) {
         if (m_input.current().isEmpty() && !isWaitingForScripts()) {
             // We have parsed until the end of the current input and so are now moving ahead of the preload scanner.
             // Clear the scanner so we know to scan starting from the current input point if we block again.
@@ skipping 376 matching lines @@
         (*WTF::bind(function, std::forward<Ps>(parameters)...))();
         return;
     case Asynchronous:
         m_loadingTaskRunner->postTask(BLINK_FROM_HERE, WTF::bind(function, std::forward<Ps>(parameters)...));
         return;
     }
     NOTREACHED();
 }
 
 } // namespace blink