LocalWindow::printErrorMessage(): check if frame is available.

Source/core/frame/LocalDOMWindow.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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
@@ skipping 1707 matching lines @@
 
     // We want a new history item if we are processing a user gesture.
     m_frame->navigationScheduler().scheduleLocationChange(activeDocument,
         // FIXME: What if activeDocument()->frame() is 0?
         completedURL, Referrer(activeDocument->outgoingReferrer(), activeDocument->referrerPolicy()),
         locking != LockHistoryBasedOnGestureState);
 }
 
 void LocalDOMWindow::printErrorMessage(const String& message)
 {
+    if (!isCurrentlyDisplayedInFrame())
+        return;
+
     if (message.isEmpty())
         return;
 
     frameConsole()->addMessage(JSMessageSource, ErrorMessageLevel, message);
 }
 
 // FIXME: Once we're throwing exceptions for cross-origin access violations, we will always sanitize the target
 // frame details, so we can safely combine 'crossDomainAccessErrorMessage' with this method after considering
 // exactly which details may be exposed to JavaScript.
 //
@@ skipping 215 matching lines @@
     visitor->trace(m_localStorage);
     visitor->trace(m_applicationCache);
     visitor->trace(m_performance);
     visitor->trace(m_css);
     visitor->trace(m_eventQueue);
     WillBeHeapSupplementable<LocalDOMWindow>::trace(visitor);
     EventTargetWithInlineData::trace(visitor);
 }
 
 } // namespace blink