Make error messages for cross-domain access OOPIF-friendly.

Source/core/frame/LocalFrame.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Simon Hausmann <hausmann@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  *                     2001 George Staikos <staikos@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2005 Alexey Proskuryakov <ap@nypop.com>
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
@@ skipping 269 matching lines @@
     m_supplements.clear();
 }
 
 SecurityContext* LocalFrame::securityContext() const
 {
     return document();
 }
 
 void LocalFrame::printNavigationErrorMessage(const Frame& targetFrame, const char* reason)
 {
-    if (!targetFrame.isLocalFrame())
-        return;
-
-    const LocalFrame& targetLocalFrame = toLocalFrameTemporary(targetFrame);
-    String message = "Unsafe JavaScript attempt to initiate navigation for frame with URL '" + targetLocalFrame.document()->url().string() + "' from frame with URL '" + document()->url().string() + "'. " + reason + "\n";
+    // URLs aren't available for RemoteFrames, so the error message uses their
+    // origin instead.
+    String targetFrameDescription = targetFrame.isLocalFrame() ? "with URL '" + toLocalFrame(targetFrame).document()->url().string() + "'" : "with origin '" + targetFrame.securityContext()->securityOrigin()->toString() + "'";
+    String message = "Unsafe JavaScript attempt to initiate navigation for frame " + targetFrameDescription + " from frame with URL '" + document()->url().string() + "'. " + reason + "\n";
 
     localDOMWindow()->printErrorMessage(message);
 }
 
 bool LocalFrame::isLoadingAsChild() const
 {
     return isLoading() || !document()->isLoadCompleted();
 }
 
 WindowProxyManager* LocalFrame::windowProxyManager() const
@@ skipping 510 matching lines @@
     , m_textZoomFactor(parentTextZoomFactor(this))
     , m_inViewSourceMode(false)
 {
     if (isLocalRoot())
         m_instrumentingAgents = InstrumentingAgents::create();
     else
         m_instrumentingAgents = localFrameRoot()->m_instrumentingAgents;
 }
 
 } // namespace blink