PlzNavigate: don't stop all loaders when renderer-initiated nav fails

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.
@@ skipping 1572 matching lines @@
   }
 
   if (!LocalDOMWindow::allowPopUp(*m_frame) &&
       !UserGestureIndicator::utilizeUserGesture())
     return NavigationPolicyIgnore;
   client()->loadURLExternally(request, policy, String(),
                               replacesCurrentHistoryItem);
   return NavigationPolicyIgnore;
 }
 
+void FrameLoader::clientDroppedNavigation() {
+  if (!m_provisionalDocumentLoader || m_provisionalDocumentLoader->didStart())
+    return;
+
+  detachDocumentLoader(m_provisionalDocumentLoader);
+}
+
 NavigationPolicy FrameLoader::checkLoadCanStart(
     FrameLoadRequest& frameLoadRequest,
     FrameLoadType type,
     NavigationPolicy navigationPolicy,
     NavigationType navigationType) {
   if (m_frame->document()->pageDismissalEventBeingDispatched() !=
       Document::NoDismissal) {
     return NavigationPolicyIgnore;
   }
 
@@ skipping 299 matching lines @@
       frameLoadRequest.clientRedirect());
 
   loader->setLoadType(loadType);
   loader->setNavigationType(navigationType);
   loader->setReplacesCurrentHistoryItem(loadType ==
                                         FrameLoadTypeReplaceCurrentItem);
   return loader;
 }
 
 }  // namespace blink