Convert HTMLFrameOwnerElement and FocusController to use Frame.

Source/web/WebPageSerializer.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 95 matching lines @@
 void retrieveResourcesForElement(Element* element,
                                  Vector<LocalFrame*>* visitedFrames,
                                  Vector<LocalFrame*>* framesToVisit,
                                  Vector<KURL>* frameURLs,
                                  Vector<KURL>* resourceURLs)
 {
     // If the node is a frame, we'll process it later in retrieveResourcesForFrame.
     if ((element->hasTagName(HTMLNames::iframeTag) || element->hasTagName(HTMLNames::frameTag)
         || element->hasTagName(HTMLNames::objectTag) || element->hasTagName(HTMLNames::embedTag))
             && element->isFrameOwnerElement()) {
-        if (LocalFrame* frame = toHTMLFrameOwnerElement(element)->contentFrame()) {
+        if (LocalFrame* frame = toLocalFrame(toHTMLFrameOwnerElement(element)->contentFrame())) {
             if (!visitedFrames->contains(frame))
                 framesToVisit->append(frame);
             return;
         }
     }
 
     KURL url = getSubResourceURLFromElement(element);
     if (url.isEmpty() || !url.isValid())
         return; // No subresource for this node.
 
@@ skipping 162 matching lines @@
 
 WebString WebPageSerializer::generateBaseTagDeclaration(const WebString& baseTarget)
 {
     if (baseTarget.isEmpty())
         return String("<base href=\".\">");
     String baseString = "<base href=\".\" target=\"" + static_cast<const String&>(baseTarget) + "\">";
     return baseString;
 }
 
 } // namespace blink