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

Source/core/rendering/RenderObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 3050 matching lines @@
 {
     int outlineSize = outlineStyleForRepaint()->outlineSize();
     if (const ShadowData* boxShadow = style()->boxShadow()) {
         boxShadow->adjustRectForShadow(rect, outlineSize);
         return;
     }
 
     rect.inflate(outlineSize);
 }
 
-AnimationController* RenderObject::animation() const
+NonNullPtr<AnimationController> RenderObject::animation() const
 {
     return frame()->animation();
 }
 
 bool RenderObject::isInert() const
 {
     const RenderObject* renderer = this;
     while (!renderer->node())
         renderer = renderer->parent();
     return renderer->node()->isInert();
@@ skipping 240 matching lines @@
 {
     if (object1) {
         const WebCore::RenderObject* root = object1;
         while (root->parent())
             root = root->parent();
         root->showRenderTreeAndMark(object1, "*", object2, "-", 0);
     }
 }
 
 #endif