Revert of Don't post multiple task for executing blocked scripts.

third_party/WebKit/Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
@@ skipping 3338 matching lines @@
 
   // Only imports on master documents can trigger rendering.
   if (HTMLImportLoader* import = importLoader())
     import->didRemoveAllPendingStylesheet();
   if (!haveImportsLoaded())
     return;
   didLoadAllScriptBlockingResources();
 }
 
 void Document::didLoadAllScriptBlockingResources() {
-  if (m_executeScriptsWaitingForResourcesTaskHandle.isActive())
-    return;
-
   // Use wrapWeakPersistent because the task should not keep this Document alive
   // just for executing scripts.
   m_executeScriptsWaitingForResourcesTaskHandle =
       TaskRunnerHelper::get(TaskType::Networking, this)
           ->postCancellableTask(
               BLINK_FROM_HERE,
               WTF::bind(&Document::executeScriptsWaitingForResources,
                         wrapWeakPersistent(this)));
 
   if (isHTMLDocument() && body()) {
@@ skipping 3212 matching lines @@
 }
 
 void showLiveDocumentInstances() {
   WeakDocumentSet& set = liveDocumentSet();
   fprintf(stderr, "There are %u documents currently alive:\n", set.size());
   for (Document* document : set)
     fprintf(stderr, "- Document %p URL: %s\n", document,
             document->url().getString().utf8().data());
 }
 #endif