Properly suspend HTMLDocumentParser

Source/core/html/parser/HTMLParserScheduler.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 82 matching lines @@
 }
 
 void HTMLParserScheduler::continueNextChunkTimerFired(Timer<HTMLParserScheduler>* timer)
 {
     ASSERT_UNUSED(timer, timer == &m_continueNextChunkTimer);
     m_parser->resumeParsingAfterYield();
 }
 
 void HTMLParserScheduler::scheduleForResume()
 {
+    ASSERT(!m_isSuspendedWithActiveTimer);
     m_continueNextChunkTimer.startOneShot(0, FROM_HERE);
 }
 
 void HTMLParserScheduler::suspend()
 {
     ASSERT(!m_isSuspendedWithActiveTimer);
     if (!m_continueNextChunkTimer.isActive())
         return;
     m_isSuspendedWithActiveTimer = true;
     m_continueNextChunkTimer.stop();
@@ skipping 35 matching lines @@
 bool HTMLParserScheduler::yieldIfNeeded(const SpeculationsPumpSession& session, bool startingScript)
 {
     if (shouldYield(session, startingScript)) {
         scheduleForResume();
         return true;
     }
 
     return false;
 }
 
+void HTMLParserScheduler::forceResumeAfterYield()
+{
+    ASSERT(!m_continueNextChunkTimer.isActive());
+    m_isSuspendedWithActiveTimer = true;
 }
+
+}