PlzNavigate: Fix anchor-no-multiple-windows.html layout test.

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 2643 matching lines @@
       if (parser->isParsing()) {
         // FIXME: HTML5 doesn't tell us to check this, it might not be correct.
         if (parser->isExecutingScript())
           return;
 
         if (!parser->wasCreatedByScript() && parser->hasInsertionPoint())
           return;
       }
     }
 
-    if (m_frame->loader().provisionalDocumentLoader())
+    // PlzNavigate: We should abort ongoing navigations handled by the client.
+    if (m_frame->loader().hasProvisionalNavigation())
       m_frame->loader().stopAllLoaders();
   }
 
   removeAllEventListenersRecursively();
   implicitOpen(ForceSynchronousParsing);
   if (ScriptableDocumentParser* parser = scriptableDocumentParser())
     parser->setWasCreatedByScript(true);
 
   if (m_frame)
     m_frame->loader().didExplicitOpen();
@@ skipping 3908 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