Return reference from styleEngine() accessor.

Source/core/layout/LayoutObject.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 2628 matching lines @@
                 return rendererForFirstLineStyle->getCachedPseudoStyle(FIRST_LINE_INHERITED, parentStyle);
             }
             return rendererForFirstLineStyle->getUncachedPseudoStyle(PseudoStyleRequest(FIRST_LINE_INHERITED), parentStyle, style);
         }
     }
     return nullptr;
 }
 
 PassRefPtr<LayoutStyle> LayoutObject::uncachedFirstLineStyle(LayoutStyle* style) const
 {
-    if (!document().styleEngine()->usesFirstLineRules())
+    if (!document().styleEngine().usesFirstLineRules())
         return nullptr;
 
     ASSERT(!isText());
 
     return firstLineStyleForCachedUncachedType(Uncached, this, style);
 }
 
 LayoutStyle* LayoutObject::cachedFirstLineStyle() const
 {
-    ASSERT(document().styleEngine()->usesFirstLineRules());
+    ASSERT(document().styleEngine().usesFirstLineRules());
 
     if (RefPtr<LayoutStyle> style = firstLineStyleForCachedUncachedType(Cached, isText() ? parent() : this, m_style.get()))
         return style.get();
 
     return m_style.get();
 }
 
 LayoutStyle* LayoutObject::getCachedPseudoStyle(PseudoId pseudo, LayoutStyle* parentStyle) const
 {
     if (pseudo < FIRST_INTERNAL_PSEUDOID && !style()->hasPseudoStyle(pseudo))
@@ skipping 523 matching lines @@
 {
     if (object1) {
         const blink::LayoutObject* root = object1;
         while (root->parent())
             root = root->parent();
         root->showRenderTreeAndMark(object1, "*", object2, "-", 0);
     }
 }
 
 #endif