Let blink scheduler know when background parsing a document

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 703 matching lines @@
 }
 
 void HTMLDocumentParser::startBackgroundParser()
 {
     ASSERT(!isStopped());
     ASSERT(shouldUseThreading());
     ASSERT(!m_haveBackgroundParser);
     ASSERT(document());
     m_haveBackgroundParser = true;
 
+    if (document()->frame() && document()->frame()->frameScheduler())
+        document()->frame()->frameScheduler()->setDocumentParsingInBackground(true);
+
     // Make sure that a resolver is set up, so that the correct viewport dimensions will be fed to the background parser and preload scanner.
     if (document()->loader())
         document()->ensureStyleResolver();
 
     RefPtr<WeakReference<BackgroundHTMLParser>> reference = WeakReference<BackgroundHTMLParser>::createUnbound();
     m_backgroundParser = WeakPtr<BackgroundHTMLParser>(reference);
 
     std::unique_ptr<BackgroundHTMLParser::Configuration> config = wrapUnique(new BackgroundHTMLParser::Configuration);
     config->options = m_options;
     config->parser = m_weakFactory.createWeakPtr();
@@ skipping 21 matching lines @@
         MediaValuesCached::MediaValuesCachedData(*document()),
         passed(m_loadingTaskRunner->clone()));
 }
 
 void HTMLDocumentParser::stopBackgroundParser()
 {
     ASSERT(shouldUseThreading());
     ASSERT(m_haveBackgroundParser);
     m_haveBackgroundParser = false;
 
+    if (document()->frame() && document()->frame()->frameScheduler())
+        document()->frame()->frameScheduler()->setDocumentParsingInBackground(false);
+
     // Make this sync, as lsan triggers on some unittests if the task runner is
     // used. Note that these lifetimes will be much more concrete if
     // ParseHTMLOnMainThread lands (the lookahead parser will be a member).
     postTaskToLookaheadParser(Synchronous, &BackgroundHTMLParser::stop, m_backgroundParser);
     m_weakFactory.revokeAll();
 }
 
 void HTMLDocumentParser::append(const String& inputSource)
 {
     if (isStopped())
@@ skipping 381 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