Make RenderObject::style() return a const object

Source/core/paint/EllipsisBoxPainter.cpp

Index: Source/core/paint/EllipsisBoxPainter.cpp
diff --git a/Source/core/paint/EllipsisBoxPainter.cpp b/Source/core/paint/EllipsisBoxPainter.cpp
index 0cf37be456d2266c342a98f0a79f9cee50cff481..5196cd9e13f023a5e1cacfde335b701854ac6289 100644
--- a/Source/core/paint/EllipsisBoxPainter.cpp
+++ b/Source/core/paint/EllipsisBoxPainter.cpp
@@ -17,12 +17,12 @@ namespace blink {
 
 void EllipsisBoxPainter::paint(const PaintInfo& paintInfo, const LayoutPoint& paintOffset, LayoutUnit lineTop, LayoutUnit lineBottom)
 {
-    RenderStyle* style = m_ellipsisBox.renderer().style(m_ellipsisBox.isFirstLineStyle());
+    const RenderStyle* style = m_ellipsisBox.renderer().style(m_ellipsisBox.isFirstLineStyle());
     paintEllipsis(paintInfo, paintOffset, lineTop, lineBottom, style);
     paintMarkupBox(paintInfo, paintOffset, lineTop, lineBottom, style);
 }
 
-void EllipsisBoxPainter::paintEllipsis(const PaintInfo& paintInfo, const LayoutPoint& paintOffset, LayoutUnit lineTop, LayoutUnit lineBottom, RenderStyle* style)
+void EllipsisBoxPainter::paintEllipsis(const PaintInfo& paintInfo, const LayoutPoint& paintOffset, LayoutUnit lineTop, LayoutUnit lineBottom, const RenderStyle* style)
 {
     GraphicsContext* context = paintInfo.context;
     FloatPoint boxOrigin = m_ellipsisBox.locationIncludingFlipping().toFloatPoint();
@@ -58,7 +58,7 @@ void EllipsisBoxPainter::paintEllipsis(const PaintInfo& paintInfo, const LayoutP
     textPainter.paint(0, m_ellipsisBox.ellipsisStr().length(), m_ellipsisBox.ellipsisStr().length(), textStyle);
 }
 
-void EllipsisBoxPainter::paintMarkupBox(const PaintInfo& paintInfo, const LayoutPoint& paintOffset, LayoutUnit lineTop, LayoutUnit lineBottom, RenderStyle* style)
+void EllipsisBoxPainter::paintMarkupBox(const PaintInfo& paintInfo, const LayoutPoint& paintOffset, LayoutUnit lineTop, LayoutUnit lineBottom, const RenderStyle* style)
 {
     InlineBox* markupBox = m_ellipsisBox.markupBox();
     if (!markupBox)
@@ -70,7 +70,7 @@ void EllipsisBoxPainter::paintMarkupBox(const PaintInfo& paintInfo, const Layout
     markupBox->paint(paintInfo, adjustedPaintOffset, lineTop, lineBottom);
 }
 
-void EllipsisBoxPainter::paintSelection(GraphicsContext* context, const FloatPoint& boxOrigin, RenderStyle* style, const Font& font)
+void EllipsisBoxPainter::paintSelection(GraphicsContext* context, const FloatPoint& boxOrigin, const RenderStyle* style, const Font& font)
 {
     Color textColor = m_ellipsisBox.renderer().resolveColor(style, CSSPropertyColor);
     Color c = m_ellipsisBox.renderer().selectionBackgroundColor();