Return reference from styleEngine() accessor.

Source/core/layout/line/RootInlineBox.cpp

 /*
  * Copyright (C) 2003, 2006, 2008 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 685 matching lines @@
     if (box->renderer().isText())
         return box->parent()->logicalTop();
 
     LayoutBoxModelObject* renderer = box->boxModelObject();
     ASSERT(renderer->isInline());
     if (!renderer->isInline())
         return 0;
 
     // This method determines the vertical position for inline elements.
     bool firstLine = isFirstLineStyle();
-    if (firstLine && !renderer->document().styleEngine()->usesFirstLineRules())
+    if (firstLine && !renderer->document().styleEngine().usesFirstLineRules())
         firstLine = false;
 
     // Check the cache.
     bool isLayoutInline = renderer->isLayoutInline();
     if (isLayoutInline && !firstLine) {
         LayoutUnit verticalPosition = verticalPositionCache.get(renderer, baselineType());
         if (verticalPosition != PositionUndefined)
             return verticalPosition;
     }
 
@@ skipping 133 matching lines @@
 }
 
 #ifndef NDEBUG
 const char* RootInlineBox::boxName() const
 {
     return "RootInlineBox";
 }
 #endif
 
 } // namespace blink