Make RenderObject::style() return a const object

Source/core/layout/LayoutTheme.h

 /*
  * This file is part of the theme implementation for form controls in WebCore.
  *
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Computer, Inc.
  *
  * 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 124 matching lines @@
     virtual Color platformDefaultCompositionBackgroundColor() const { return defaultCompositionBackgroundColor; }
     virtual void platformColorsDidChange();
 
     virtual double caretBlinkInterval() const { return 0.5; }
 
     // System fonts and colors for CSS.
     virtual void systemFont(CSSValueID systemFontID, FontStyle&, FontWeight&, float& fontSize, AtomicString& fontFamily) const = 0;
     void systemFont(CSSValueID systemFontID, FontDescription&);
     virtual Color systemColor(CSSValueID) const;
 
-    virtual int minimumMenuListSize(RenderStyle*) const { return 0; }
+    virtual int minimumMenuListSize(const RenderStyle*) const { return 0; }
 
     virtual void adjustSliderThumbSize(RenderStyle*, Element*) const;
 
-    virtual int popupInternalPaddingLeft(RenderStyle*) const { return 0; }
-    virtual int popupInternalPaddingRight(RenderStyle*) const { return 0; }
-    virtual int popupInternalPaddingTop(RenderStyle*) const { return 0; }
-    virtual int popupInternalPaddingBottom(RenderStyle*) const { return 0; }
+    virtual int popupInternalPaddingLeft(const RenderStyle*) const { return 0; }
+    virtual int popupInternalPaddingRight(const RenderStyle*) const { return 0; }
+    virtual int popupInternalPaddingTop(const RenderStyle*) const { return 0; }
+    virtual int popupInternalPaddingBottom(const RenderStyle*) const { return 0; }
     virtual bool popupOptionSupportsTextIndent() const { return false; }
 
     virtual ScrollbarControlSize scrollbarControlSizeForPart(ControlPart) { return RegularScrollbar; }
 
     // Method for painting the caps lock indicator
     virtual bool paintCapsLockIndicator(RenderObject*, const PaintInfo&, const IntRect&) { return 0; };
 
     // Returns the repeat interval of the animation for the progress bar.
     virtual double animationRepeatIntervalForProgressBar(RenderProgress*) const;
     // Returns the duration of the animation for the progress bar.
@@ skipping 104 matching lines @@
     virtual bool paintMediaVolumeSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
     virtual bool paintMediaVolumeSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
     virtual bool paintMediaToggleClosedCaptionsButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
     virtual bool paintMediaCastButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; };
     virtual bool paintMediaControlsBackground(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
     virtual bool paintMediaCurrentTime(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
     virtual bool paintMediaTimeRemaining(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
     virtual bool paintMediaFullScreenVolumeSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
     virtual bool paintMediaFullScreenVolumeSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
 
-    virtual bool shouldUseFallbackTheme(RenderStyle*) const;
+    virtual bool shouldUseFallbackTheme(const RenderStyle*) const;
     void adjustStyleUsingFallbackTheme(RenderStyle*, Element*);
     bool paintUsingFallbackTheme(RenderObject*, const PaintInfo&, const IntRect&);
     void adjustCheckboxStyleUsingFallbackTheme(RenderStyle*, Element*) const;
     bool paintCheckboxUsingFallbackTheme(RenderObject*, const PaintInfo&, const IntRect&);
     void adjustRadioStyleUsingFallbackTheme(RenderStyle*, Element*) const;
     bool paintRadioUsingFallbackTheme(RenderObject*, const PaintInfo&, const IntRect&);
 
 public:
     // Methods for state querying
     ControlStates controlStatesForRenderer(const RenderObject*) const;
@@ skipping 19 matching lines @@
     static const RGBA32 defaultCompositionBackgroundColor = 0xFFFFDD55;
 
 #if USE(NEW_THEME)
     Theme* m_platformTheme; // The platform-specific theme.
 #endif
 };
 
 } // namespace blink
 
 #endif // LayoutTheme_h