Make InlineBox::renderer() and related subclass methods return reference.

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 3194 matching lines @@
     if (position.isNotNull())
         return PositionWithAffinity(position);
 
     ASSERT(!node());
     return createPositionWithAffinity(0, DOWNSTREAM);
 }
 
 ETextAlign RenderObject::simplifiedTextAlign(const ETextAlign& textAlign, const RootInlineBox* rootInlineBox) const
 {
     TextDirection direction;
-    if (rootInlineBox && rootInlineBox->renderer()->style()->unicodeBidi() == Plaintext)
+    if (rootInlineBox && rootInlineBox->renderer().style()->unicodeBidi() == Plaintext)
         direction = rootInlineBox->direction();
     else
         direction = style()->direction();
 
     bool isLTR = isLeftToRightDirection(direction);
 
     switch (textAlign) {
     case LEFT:
     case WEBKIT_LEFT:
         return LEFT;
@@ skipping 113 matching lines @@
 {
     if (object1) {
         const WebCore::RenderObject* root = object1;
         while (root->parent())
             root = root->parent();
         root->showRenderTreeAndMark(object1, "*", object2, "-", 0);
     }
 }
 
 #endif