Disable navigations in the unload handler.

third_party/WebKit/Source/core/frame/History.cpp

 /*
  * Copyright (C) 2007 Apple 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 158 matching lines @@
     if (!m_frame || !m_frame->loader().client())
         return;
 
     ASSERT(isMainThread());
     Document* activeDocument = toDocument(context);
     if (!activeDocument)
         return;
 
     if (!activeDocument->frame() || !activeDocument->frame()->canNavigate(*m_frame))
         return;
-    if (!NavigationDisablerForBeforeUnload::isNavigationAllowed())
+    if (!NavigationDisablerForUnload::isNavigationAllowed())
         return;
 
     // We intentionally call reload() for the current frame if delta is zero.
     // Otherwise, navigation happens on the root frame.
     // This behavior is designed in the following spec.
     // https://html.spec.whatwg.org/multipage/browsers.html#dom-history-go
     if (delta)
         m_frame->loader().client()->navigateBackForward(delta);
     else
         m_frame->reload(FrameLoadTypeReload, ClientRedirectPolicy::ClientRedirect);
@@ skipping 44 matching lines @@
     if (!canChangeToUrl(fullURL, m_frame->document()->getSecurityOrigin(), m_frame->document()->url())) {
         // We can safely expose the URL to JavaScript, as a) no redirection takes place: JavaScript already had this URL, b) JavaScript can only access a same-origin History object.
         exceptionState.throwSecurityError("A history state object with URL '" + fullURL.elidedString() + "' cannot be created in a document with origin '" + m_frame->document()->getSecurityOrigin()->toString() + "' and URL '" + m_frame->document()->url().elidedString() + "'.");
         return;
     }
 
     m_frame->loader().updateForSameDocumentNavigation(fullURL, SameDocumentNavigationHistoryApi, data, restorationType, type, m_frame->document());
 }
 
 } // namespace blink