Return reference from styleEngine() accessor.

Source/core/layout/LayoutObjectInlines.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef LayoutObjectInlines_h
 #define LayoutObjectInlines_h
 
 #include "core/dom/StyleEngine.h"
 #include "core/layout/LayoutObject.h"
 
 namespace blink {
 
 // The following methods are inlined for performance but not put in
 // LayoutObject.h because that would unnecessarily tie LayoutObject.h
 // to StyleEngine.h for all users of LayoutObject.h that don't use
 // these methods.
 
 inline LayoutStyle* LayoutObject::firstLineStyle() const
 {
-    return document().styleEngine()->usesFirstLineRules() ? cachedFirstLineStyle() : style();
+    return document().styleEngine().usesFirstLineRules() ? cachedFirstLineStyle() : style();
 }
 
 inline const LayoutStyle& LayoutObject::firstLineStyleRef() const
 {
     const LayoutStyle* style =  firstLineStyle();
     ASSERT(style);
     return *style;
 }
 
 inline LayoutStyle* LayoutObject::style(bool firstLine) const
 {
     return firstLine ? firstLineStyle() : style();
 }
 
 inline const LayoutStyle& LayoutObject::styleRef(bool firstLine) const
 {
     const LayoutStyle* style = this->style(firstLine);
     ASSERT(style);
     return *style;
 }
 
 }
 
 #endif