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

Source/core/dom/shadow/ShadowRoot.h

 /*
  * Copyright (C) 2011 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.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 127 matching lines @@
     unsigned m_numberOfStyles : 27;
     unsigned m_applyAuthorStyles : 1;
     unsigned m_resetStyleInheritance : 1;
     unsigned m_type : 1;
     unsigned m_registeredWithParentShadowRoot : 1;
     unsigned m_childInsertionPointsIsValid : 1;
 };
 
 inline Element* ShadowRoot::activeElement() const
 {
-    if (Element* element = treeScope().adjustedFocusedElement())
+    if (Element* element = treeScope()->adjustedFocusedElement())
         return element;
     return 0;
 }
 
 inline const ShadowRoot* toShadowRoot(const Node* node)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!node || node->isShadowRoot());
     return static_cast<const ShadowRoot*>(node);
 }
 
@@ skipping 21 matching lines @@
 
 inline ShadowRoot& toShadowRoot(TreeScope& treeScope)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(treeScope.rootNode() && treeScope.rootNode()->isShadowRoot());
     return static_cast<ShadowRoot&>(treeScope);
 }
 
 } // namespace
 
 #endif