Return reference from styleEngine() accessor.

Source/core/layout/LayoutInline.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 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.
  *
@@ skipping 221 matching lines @@
     const LayoutStyle& parentStyle = parent()->styleRef();
     LayoutInline* parentLayoutInline = parent()->isLayoutInline() ? toLayoutInline(parent()) : 0;
     bool checkFonts = document().inNoQuirksMode();
     bool alwaysCreateLineBoxesNew = (parentLayoutInline && parentLayoutInline->alwaysCreateLineBoxes())
         || (parentLayoutInline && parentStyle.verticalAlign() != BASELINE)
         || style()->verticalAlign() != BASELINE
         || style()->textEmphasisMark() != TextEmphasisMarkNone
         || (checkFonts && (!parentStyle.font().fontMetrics().hasIdenticalAscentDescentAndLineGap(style()->font().fontMetrics())
         || parentStyle.lineHeight() != style()->lineHeight()));
 
-    if (!alwaysCreateLineBoxesNew && checkFonts && document().styleEngine()->usesFirstLineRules()) {
+    if (!alwaysCreateLineBoxesNew && checkFonts && document().styleEngine().usesFirstLineRules()) {
         // Have to check the first line style as well.
         const LayoutStyle& firstLineParentStyle = parent()->styleRef(true);
         const LayoutStyle& childStyle = styleRef(true);
         alwaysCreateLineBoxesNew = !firstLineParentStyle.font().fontMetrics().hasIdenticalAscentDescentAndLineGap(childStyle.font().fontMetrics())
         || childStyle.verticalAlign() != BASELINE
         || firstLineParentStyle.lineHeight() != childStyle.lineHeight();
     }
 
     if (alwaysCreateLineBoxesNew) {
         if (!fullLayout)
@@ skipping 1054 matching lines @@
 InlineFlowBox* LayoutInline::createAndAppendInlineFlowBox()
 {
     setAlwaysCreateLineBoxes();
     InlineFlowBox* flowBox = createInlineFlowBox();
     m_lineBoxes.appendLineBox(flowBox);
     return flowBox;
 }
 
 LayoutUnit LayoutInline::lineHeight(bool firstLine, LineDirectionMode /*direction*/, LinePositionMode /*linePositionMode*/) const
 {
-    if (firstLine && document().styleEngine()->usesFirstLineRules()) {
+    if (firstLine && document().styleEngine().usesFirstLineRules()) {
         const LayoutStyle* s = style(firstLine);
         if (s != style())
             return s->computedLineHeight();
     }
 
     return style()->computedLineHeight();
 }
 
 int LayoutInline::baselinePosition(FontBaseline baselineType, bool firstLine, LineDirectionMode direction, LinePositionMode linePositionMode) const
 {
@@ skipping 128 matching lines @@
 }
 
 void LayoutInline::invalidateDisplayItemClients(DisplayItemList* displayItemList) const
 {
     LayoutBoxModelObject::invalidateDisplayItemClients(displayItemList);
     for (InlineFlowBox* box = firstLineBox(); box; box = box->nextLineBox())
         displayItemList->invalidate(box->displayItemClient());
 }
 
 } // namespace blink