Have Frame::navigationScheduler() return a reference

Source/web/ApplicationCacheHost.cpp

 /*
  * Copyright (C) 2009 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 91 matching lines @@
 void ApplicationCacheHost::selectCacheWithManifest(const KURL& manifestURL)
 {
     if (m_internal) {
         if (!m_internal->m_outerHost->selectCacheWithManifest(manifestURL)) {
             // It's a foreign entry, restart the current navigation from the top
             // of the navigation algorithm. The navigation will not result in the
             // same resource being loaded, because "foreign" entries are never picked
             // during navigation.
             // see WebCore::ApplicationCacheGroup::selectCache()
             Frame* frame = m_documentLoader->frame();
-            frame->navigationScheduler()->scheduleLocationChange(frame->document()->securityOrigin(),
+            frame->navigationScheduler().scheduleLocationChange(frame->document()->securityOrigin(),
                 frame->document()->url(), frame->document()->referrer());
         }
     }
 }
 
 void ApplicationCacheHost::didReceiveResponseForMainResource(const ResourceResponse& response)
 {
     if (m_internal) {
         WrappedResourceResponse wrapped(response);
         m_internal->m_outerHost->didReceiveResponseForMainResource(wrapped);
@@ skipping 119 matching lines @@
 }
 
 bool ApplicationCacheHost::isApplicationCacheEnabled()
 {
     ASSERT(m_documentLoader->frame());
     return m_documentLoader->frame()->settings()
            && m_documentLoader->frame()->settings()->offlineWebApplicationCacheEnabled();
 }
 
 }  // namespace WebCore