When pumping tokens yield for scripts waiting for resources.

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 254 matching lines @@
     // We will not have a scriptRunner when parsing a DocumentFragment.
     if (m_scriptRunner)
         m_scriptRunner->execute(scriptElement, scriptStartPosition);
 }
 
 bool HTMLDocumentParser::canTakeNextToken()
 {
     if (isStopped())
         return false;
 
-    if (isWaitingForScripts()) {
-        // If we're paused waiting for a script, we try to execute scripts before continuing.
+    // If we're paused waiting for a script, we try to execute scripts before continuing.
+    if (m_treeBuilder->hasParserBlockingScript())
         runScriptsForPausedTreeBuilder();
-        if (isStopped())
-            return false;
-        if (isWaitingForScripts())
-            return false;
-    }
+    if (isStopped() || isWaitingForScripts())
+        return false;
 
     // FIXME: It's wrong for the HTMLDocumentParser to reach back to the
     //        LocalFrame, but this approach is how the old parser handled
     //        stopping when the page assigns window.location.  What really
     //        should happen is that assigning window.location causes the
     //        parser to stop parsing cleanly.  The problem is we're not
     //        perpared to do that at every point where we run JavaScript.
     if (!isParsingFragment()
         && document()->frame() && document()->frame()->navigationScheduler().locationChangePending())
         return false;
@@ skipping 833 matching lines @@
         DEFINE_STATIC_LOCAL(CustomCountHistogram, successHistogram, ("PreloadScanner.DocumentWrite.ExecutionTime.Success", 1, 10000, 50));
         successHistogram.count(duration);
     } else {
         DEFINE_STATIC_LOCAL(CustomCountHistogram, failureHistogram, ("PreloadScanner.DocumentWrite.ExecutionTime.Failure", 1, 10000, 50));
         failureHistogram.count(duration);
     }
 
 }
 
 } // namespace blink