Disable navigations in the unload handler.

third_party/WebKit/Source/core/loader/FrameLoader.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008 Alp Toker <alp@atoker.com>
  * Copyright (C) Research In Motion Limited 2009. All rights reserved.
  * Copyright (C) 2011 Kris Jordan <krisjordan@gmail.com>
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ skipping 256 matching lines @@
     m_currentItem->setVisualViewportScrollPoint(m_frame->host()->visualViewport().visibleRect().location());
 
     if (m_frame->isMainFrame())
         m_currentItem->setPageScaleFactor(m_frame->page()->pageScaleFactor());
 
     client()->didUpdateCurrentHistoryItem();
 }
 
 void FrameLoader::dispatchUnloadEvent()
 {
-    NavigationCounterForUnload counter;
+    NavigationDisablerForUnload navigationDisabler;
 
     // If the frame is unloading, the provisional loader should no longer be
     // protected. It will be detached soon.
     m_protectProvisionalLoader = false;
     saveScrollState();
 
     if (m_frame->document() && !SVGImage::isInSVGImage(m_frame->document()))
         m_frame->document()->dispatchUnloadEvents();
 }
 
@@ skipping 1056 matching lines @@
     HeapVector<Member<LocalFrame>> targetFrames;
     targetFrames.append(m_frame);
     for (Frame* child = m_frame->tree().firstChild(); child; child = child->tree().traverseNext(m_frame)) {
         // FIXME: There is not yet any way to dispatch events to out-of-process frames.
         if (child->isLocalFrame())
             targetFrames.append(toLocalFrame(child));
     }
 
     bool shouldClose = false;
     {
-        NavigationDisablerForBeforeUnload navigationDisabler;
+        NavigationDisablerForUnload navigationDisabler;
         size_t i;
 
         bool didAllowNavigation = false;
         for (i = 0; i < targetFrames.size(); i++) {
             if (!targetFrames[i]->tree().isDescendantOf(m_frame))
                 continue;
             if (!targetFrames[i]->document()->dispatchBeforeUnloadEvent(page->chromeClient(), isReload, didAllowNavigation))
                 break;
         }
 
@@ skipping 254 matching lines @@
     tracedValue->setString("documentLoaderURL", m_documentLoader ? m_documentLoader->url() : String());
     return tracedValue;
 }
 
 inline void FrameLoader::takeObjectSnapshot() const
 {
     TRACE_EVENT_OBJECT_SNAPSHOT_WITH_ID("loading", "FrameLoader", this, toTracedValue());
 }
 
 } // namespace blink