Make RenderObject::style() return a const object

Source/core/layout/LayoutThemeChromiumMac.h

 /*
  * This file is part of the theme implementation for form controls in WebCore.
  *
  * Copyright (C) 2005 Apple Computer, Inc.
  * Copyright (C) 2008, 2009 Google, 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 38 matching lines @@
     virtual Color platformInactiveListBoxSelectionForegroundColor() const override;
     virtual Color platformFocusRingColor() const override;
 
     virtual ScrollbarControlSize scrollbarControlSizeForPart(ControlPart part) override { return part == ListboxPart ? SmallScrollbar : RegularScrollbar; }
 
     virtual void platformColorsDidChange() override;
 
     // System fonts.
     virtual void systemFont(CSSValueID systemFontID, FontStyle&, FontWeight&, float& fontSize, AtomicString& fontFamily) const override;
 
-    virtual int minimumMenuListSize(RenderStyle*) const override;
+    virtual int minimumMenuListSize(const RenderStyle*) const override;
 
     virtual void adjustSliderThumbSize(RenderStyle*, Element*) const override;
 
     virtual IntSize sliderTickSize() const override;
     virtual int sliderTickOffsetFromTrackCenter() const override;
 
     virtual int popupInternalPaddingLeft(RenderStyle*) const override;
     virtual int popupInternalPaddingRight(RenderStyle*) const override;
     virtual int popupInternalPaddingTop(RenderStyle*) const override;
     virtual int popupInternalPaddingBottom(RenderStyle*) const override;
@@ skipping 49 matching lines @@
 
     virtual void adjustSearchFieldResultsDecorationStyle(RenderStyle*, Element*) const override;
     virtual bool paintSearchFieldResultsDecoration(RenderObject*, const PaintInfo&, const IntRect&) override;
 
 private:
     virtual String fileListNameForWidth(Locale&, const FileList*, const Font&, int width) const override;
 
     FloatRect convertToPaintingRect(const RenderObject* inputRenderer, const RenderObject* partRenderer, const FloatRect& inputRect, const IntRect&) const;
 
     // Get the control size based off the font. Used by some of the controls (like buttons).
-    NSControlSize controlSizeForFont(RenderStyle*) const;
-    NSControlSize controlSizeForSystemFont(RenderStyle*) const;
+    NSControlSize controlSizeForFont(const RenderStyle*) const;
+    NSControlSize controlSizeForSystemFont(const RenderStyle*) const;
     void setControlSize(NSCell*, const IntSize* sizes, const IntSize& minSize, float zoomLevel = 1.0f);
     void setSizeFromFont(RenderStyle*, const IntSize* sizes) const;
     IntSize sizeForFont(RenderStyle*, const IntSize* sizes) const;
     IntSize sizeForSystemFont(RenderStyle*, const IntSize* sizes) const;
     void setFontFromControlSize(RenderStyle*, NSControlSize) const;
 
     void updateCheckedState(NSCell*, const RenderObject*);
     void updateEnabledState(NSCell*, const RenderObject*);
     void updateFocusedState(NSCell*, const RenderObject*);
     void updatePressedState(NSCell*, const RenderObject*);
@@ skipping 12 matching lines @@
     void setSearchCellState(RenderObject*, const IntRect&);
     void setSearchFieldSize(RenderStyle*) const;
 
     NSPopUpButtonCell* popupButton() const;
     NSSearchFieldCell* search() const;
     NSTextFieldCell* textField() const;
 
     NSLevelIndicatorStyle levelIndicatorStyleFor(ControlPart) const;
     NSLevelIndicatorCell* levelIndicatorFor(const RenderMeter*) const;
 
-    int minimumProgressBarHeight(RenderStyle*) const;
+    int minimumProgressBarHeight(const RenderStyle*) const;
     const IntSize* progressBarSizes() const;
     const int* progressBarMargins(NSControlSize) const;
 
 protected:
     virtual void adjustMediaSliderThumbSize(RenderStyle*) const;
     virtual bool paintMediaPlayButton(RenderObject*, const PaintInfo&, const IntRect&) override;
     virtual bool paintMediaOverlayPlayButton(RenderObject*, const PaintInfo&, const IntRect&) override;
     virtual bool paintMediaMuteButton(RenderObject*, const PaintInfo&, const IntRect&) override;
     virtual bool paintMediaSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) override;
     virtual String extraFullScreenStyleSheet() override;
@@ skipping 26 matching lines @@
     mutable RetainPtr<NSTextFieldCell> m_textField;
 
     mutable HashMap<int, RGBA32> m_systemColorCache;
 
     RetainPtr<LayoutThemeNotificationObserver> m_notificationObserver;
 };
 
 } // namespace blink
 
 #endif // LayoutThemeChromiumMac_h