Have Frame::navigationScheduler() return a reference

Source/core/frame/DOMWindow.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 1550 matching lines @@
         return;
 
     KURL completedURL = firstFrame->document()->completeURL(urlString);
     if (completedURL.isNull())
         return;
 
     if (isInsecureScriptAccess(activeWindow, completedURL))
         return;
 
     // We want a new history item if we are processing a user gesture.
-    m_frame->navigationScheduler()->scheduleLocationChange(activeDocument->securityOrigin(),
+    m_frame->navigationScheduler().scheduleLocationChange(activeDocument->securityOrigin(),
         // FIXME: What if activeDocument()->frame() is 0?
         completedURL, activeDocument->frame()->loader()->outgoingReferrer(),
         locking != LockHistoryBasedOnGestureState);
 }
 
 void DOMWindow::printErrorMessage(const String& message)
 {
     if (message.isEmpty())
         return;
 
@@ skipping 123 matching lines @@
         KURL completedURL = firstFrame->document()->completeURL(urlString);
 
         if (targetFrame->domWindow()->isInsecureScriptAccess(activeWindow, completedURL))
             return targetFrame->domWindow();
 
         if (urlString.isEmpty())
             return targetFrame->domWindow();
 
         // For whatever reason, Firefox uses the first window rather than the active window to
         // determine the outgoing referrer. We replicate that behavior here.
-        targetFrame->navigationScheduler()->scheduleLocationChange(
+        targetFrame->navigationScheduler().scheduleLocationChange(
             activeDocument->securityOrigin(),
             completedURL,
             firstFrame->loader()->outgoingReferrer(),
             false);
         return targetFrame->domWindow();
     }
 
     WindowFeatures windowFeatures(windowFeaturesString);
     Frame* result = createWindow(urlString, frameName, windowFeatures, activeWindow, firstFrame, m_frame);
     return result ? result->domWindow() : 0;
@@ skipping 41 matching lines @@
     return static_cast<DOMWindowLifecycleNotifier*>(LifecycleContext::lifecycleNotifier());
 }
 
 PassOwnPtr<LifecycleNotifier> DOMWindow::createLifecycleNotifier()
 {
     return DOMWindowLifecycleNotifier::create(this);
 }
 
 
 } // namespace WebCore