Change FrameTree to return Frames instead of LocalFrames.

Source/core/dom/TreeScope.cpp

 /*
  * Copyright (C) 2011 Google Inc. All Rights Reserved.
  * Copyright (C) 2012 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
@@ skipping 328 matching lines @@
     ASSERT(this);
     ASSERT(!node.isDocumentNode());
 #if !ENABLE(OILPAN)
     ASSERT_WITH_SECURITY_IMPLICATION(!node.m_deletionHasBegun);
 #endif
     TreeScopeAdopter adopter(node, *this);
     if (adopter.needsScopeChange())
         adopter.execute();
 }
 
-static Element* focusedFrameOwnerElement(LocalFrame* focusedFrame, LocalFrame* currentFrame)
+static Element* focusedFrameOwnerElement(Frame* focusedFrame, Frame* currentFrame)
 {
     for (; focusedFrame; focusedFrame = focusedFrame->tree().parent()) {
         if (focusedFrame->tree().parent() == currentFrame) {
             // FIXME: This won't work for OOPI.
             return focusedFrame->deprecatedLocalOwner();
         }
     }
     return 0;
 }
 
 Element* TreeScope::adjustedFocusedElement() const
 {
     Document& document = rootNode().document();
     Element* element = document.focusedElement();
-    // FIXME(kenrb): The toLocalFrame() cast should be removed when RemoteFrames can have FrameTrees.
-    // At that point, focusedFrameOwnerElement should take a Frame instead of a LocalFrame.
     if (!element && document.page())
-        element = focusedFrameOwnerElement(toLocalFrameTemporary(document.page()->focusController().focusedFrame()), document.frame());
+        element = focusedFrameOwnerElement(document.page()->focusController().focusedFrame(), document.frame());
     if (!element)
         return 0;
 
     EventPath eventPath(element);
     for (size_t i = 0; i < eventPath.size(); ++i) {
         if (eventPath[i].node() == rootNode()) {
             // eventPath.at(i).target() is one of the followings:
             // - InsertionPoint
             // - shadow host
             // - Document::focusedElement()
@@ skipping 164 matching lines @@
 void TreeScope::trace(Visitor* visitor)
 {
     visitor->trace(m_rootNode);
     visitor->trace(m_document);
     visitor->trace(m_parentTreeScope);
     visitor->trace(m_idTargetObserverRegistry);
     visitor->trace(m_selection);
 }
 
 } // namespace WebCore