Make RenderObject::style() return a const object

Source/core/layout/LayoutThemeChromiumMac.mm

 /*
  * Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 567 matching lines @@
 }
 
 void LayoutThemeChromiumMac::updatePressedState(NSCell* cell, const RenderObject* o)
 {
     bool oldPressed = [cell isHighlighted];
     bool pressed = o->node() && o->node()->active();
     if (pressed != oldPressed)
         [cell setHighlighted:pressed];
 }
 
-NSControlSize LayoutThemeChromiumMac::controlSizeForFont(RenderStyle* style) const
+NSControlSize LayoutThemeChromiumMac::controlSizeForFont(const RenderStyle* style) const
 {
     int fontSize = style->fontSize();
     if (fontSize >= 16)
         return NSRegularControlSize;
     if (fontSize >= 11)
         return NSSmallControlSize;
     return NSMiniControlSize;
 }
 
 // We don't use controlSizeForFont() for search field decorations because it
 // needs to fit into the search field. The font size will already be modified by
 // setFontFromControlSize() called on the search field.
-static NSControlSize searchFieldControlSizeForFont(RenderStyle* style)
+static NSControlSize searchFieldControlSizeForFont(const RenderStyle* style)
 {
     int fontSize = style->fontSize();
     if (fontSize >= 13)
         return NSRegularControlSize;
     if (fontSize >= 11)
         return NSSmallControlSize;
     return NSMiniControlSize;
 }
 
 void LayoutThemeChromiumMac::setControlSize(NSCell* cell, const IntSize* sizes, const IntSize& minSize, float zoomLevel)
@@ skipping 53 matching lines @@
     fontDescription.setComputedSize([font pointSize] * style->effectiveZoom());
     fontDescription.setSpecifiedSize([font pointSize] * style->effectiveZoom());
 
     // Reset line height.
     style->setLineHeight(RenderStyle::initialLineHeight());
 
     if (style->setFontDescription(fontDescription))
         style->font().update(nullptr);
 }
 
-NSControlSize LayoutThemeChromiumMac::controlSizeForSystemFont(RenderStyle* style) const
+NSControlSize LayoutThemeChromiumMac::controlSizeForSystemFont(const RenderStyle* style) const
 {
     float fontSize = style->fontSize();
     float zoomLevel = style->effectiveZoom();
     if (zoomLevel != 1)
         fontSize /= zoomLevel;
     if (fontSize >= [NSFont systemFontSizeForControlSize:NSRegularControlSize])
         return NSRegularControlSize;
     if (fontSize >= [NSFont systemFontSizeForControlSize:NSSmallControlSize])
         return NSSmallControlSize;
     return NSMiniControlSize;
@@ skipping 279 matching lines @@
 {
     static const int margins[3][4] =
     {
         { 0, 0, 1, 0 },
         { 0, 0, 1, 0 },
         { 0, 0, 1, 0 },
     };
     return margins[controlSize];
 }
 
-int LayoutThemeChromiumMac::minimumProgressBarHeight(RenderStyle* style) const
+int LayoutThemeChromiumMac::minimumProgressBarHeight(const RenderStyle* style) const
 {
     return sizeForSystemFont(style, progressBarSizes()).height();
 }
 
 double LayoutThemeChromiumMac::animationRepeatIntervalForProgressBar(RenderProgress*) const
 {
     return progressAnimationFrameRate;
 }
 
 double LayoutThemeChromiumMac::animationDurationForProgressBar(RenderProgress*) const
@@ skipping 221 matching lines @@
     updateFocusedState(popupButton, o);
 #endif
 }
 
 const IntSize* LayoutThemeChromiumMac::menuListSizes() const
 {
     static const IntSize sizes[3] = { IntSize(9, 0), IntSize(5, 0), IntSize(0, 0) };
     return sizes;
 }
 
-int LayoutThemeChromiumMac::minimumMenuListSize(RenderStyle* style) const
+int LayoutThemeChromiumMac::minimumMenuListSize(const RenderStyle* style) const
 {
     return sizeForSystemFont(style, menuListSizes()).width();
 }
 
 const int sliderTrackWidth = 5;
 const int sliderTrackBorderWidth = 1;
 
 bool LayoutThemeChromiumMac::paintSliderTrack(RenderObject* o, const PaintInfo& paintInfo, const IntRect& r)
 {
     paintSliderTicks(o, paintInfo, r);
@@ skipping 616 matching lines @@
 
 bool LayoutThemeChromiumMac::shouldUseFallbackTheme(RenderStyle* style) const
 {
     ControlPart part = style->appearance();
     if (part == CheckboxPart || part == RadioPart)
         return style->effectiveZoom() != 1;
     return false;
 }
 
 } // namespace blink