Make RenderObject::style() return a const object

Source/core/html/shadow/SliderThumbElement.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 36 matching lines @@
 #include "core/page/EventHandler.h"
 #include "core/rendering/RenderFlexibleBox.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
 inline static bool hasVerticalAppearance(HTMLInputElement* input)
 {
     ASSERT(input->renderer());
-    LayoutStyle* sliderStyle = input->renderer()->style();
+    const LayoutStyle& sliderStyle = input->renderer()->styleRef();
 
-    return sliderStyle->appearance() == SliderVerticalPart;
+    return sliderStyle.appearance() == SliderVerticalPart;
 }
 
 inline SliderThumbElement::SliderThumbElement(Document& document)
     : HTMLDivElement(document)
     , m_inDragMode(false)
 {
 }
 
 PassRefPtrWillBeRawPtr<SliderThumbElement> SliderThumbElement::create(Document& document)
 {
@@ skipping 206 matching lines @@
     DEFINE_STATIC_LOCAL(const AtomicString, mediaSliderThumb, ("-webkit-media-slider-thumb", AtomicString::ConstructFromLiteral));
     return mediaSliderThumb;
 }
 
 const AtomicString& SliderThumbElement::shadowPseudoId() const
 {
     HTMLInputElement* input = hostInput();
     if (!input || !input->renderer())
         return sliderThumbShadowPartId();
 
-    LayoutStyle* sliderStyle = input->renderer()->style();
-    switch (sliderStyle->appearance()) {
+    const LayoutStyle& sliderStyle = input->renderer()->styleRef();
+    switch (sliderStyle.appearance()) {
     case MediaSliderPart:
     case MediaSliderThumbPart:
     case MediaVolumeSliderPart:
     case MediaVolumeSliderThumbPart:
     case MediaFullScreenVolumeSliderPart:
     case MediaFullScreenVolumeSliderThumbPart:
         return mediaSliderThumbShadowPartId();
     default:
         return sliderThumbShadowPartId();
     }
@@ skipping 14 matching lines @@
 }
 
 const AtomicString& SliderContainerElement::shadowPseudoId() const
 {
     DEFINE_STATIC_LOCAL(const AtomicString, mediaSliderContainer, ("-webkit-media-slider-container", AtomicString::ConstructFromLiteral));
     DEFINE_STATIC_LOCAL(const AtomicString, sliderContainer, ("-webkit-slider-container", AtomicString::ConstructFromLiteral));
 
     if (!shadowHost() || !shadowHost()->renderer())
         return sliderContainer;
 
-    LayoutStyle* sliderStyle = shadowHost()->renderer()->style();
-    switch (sliderStyle->appearance()) {
+    const LayoutStyle& sliderStyle = shadowHost()->renderer()->styleRef();
+    switch (sliderStyle.appearance()) {
     case MediaSliderPart:
     case MediaSliderThumbPart:
     case MediaVolumeSliderPart:
     case MediaVolumeSliderThumbPart:
     case MediaFullScreenVolumeSliderPart:
     case MediaFullScreenVolumeSliderThumbPart:
         return mediaSliderContainer;
     default:
         return sliderContainer;
     }
 }
 
 }