Have Frame::loader() return a reference

Source/core/html/MediaDocument.cpp

 /*
  * Copyright (C) 2008 Apple 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:
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 60 matching lines @@
 };
 
 void MediaDocumentParser::createDocumentStructure()
 {
     ASSERT(document());
     RefPtr<HTMLHtmlElement> rootElement = HTMLHtmlElement::create(*document());
     rootElement->insertedByParser();
     document()->appendChild(rootElement);
 
     if (document()->frame())
-        document()->frame()->loader()->dispatchDocumentElementAvailable();
+        document()->frame()->loader().dispatchDocumentElementAvailable();
 
     RefPtr<HTMLHeadElement> head = HTMLHeadElement::create(*document());
     RefPtr<HTMLMetaElement> meta = HTMLMetaElement::create(*document());
     meta->setAttribute(nameAttr, "viewport");
     meta->setAttribute(contentAttr, "width=device-width");
     head->appendChild(meta.release());
 
     RefPtr<HTMLVideoElement> media = HTMLVideoElement::create(*document());
     media->setAttribute(controlsAttr, "");
     media->setAttribute(autoplayAttr, "");
@@ skipping 68 matching lines @@
                 if (video->canPlay())
                     video->play();
             } else
                 video->pause();
             event->setDefaultHandled();
         }
     }
 }
 
 }