WIP (Introduce WTF::NonNullPtr<T>.)

Source/core/editing/FrameSelection.cpp

 /*
  * Copyright (C) 2004, 2008, 2009, 2010 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 96 matching lines @@
     return selectionRoot ? selectionRoot : m_frame->document()->documentElement();
 }
 
 Node* FrameSelection::rootEditableElementOrTreeScopeRootNode() const
 {
     Element* selectionRoot = m_selection.rootEditableElement();
     if (selectionRoot)
         return selectionRoot;
 
     Node* node = m_selection.base().containerNode();
-    return node ? node->treeScope().rootNode() : 0;
+    return node ? node->treeScope()->rootNode() : 0;
 }
 
 Element* FrameSelection::rootEditableElementRespectingShadowTree() const
 {
     Element* selectionRoot = m_selection.rootEditableElement();
     if (selectionRoot && selectionRoot->isInShadowTree())
         selectionRoot = selectionRoot->shadowHost();
     return selectionRoot;
 }
 
@@ skipping 1830 matching lines @@
     sel.showTreeForThis();
 }
 
 void showTree(const WebCore::FrameSelection* sel)
 {
     if (sel)
         sel->showTreeForThis();
 }
 
 #endif