Make RenderObject::style() return a const object

Source/core/paint/InlineTextBoxPainter.cpp

Index: Source/core/paint/InlineTextBoxPainter.cpp
diff --git a/Source/core/paint/InlineTextBoxPainter.cpp b/Source/core/paint/InlineTextBoxPainter.cpp
index 5187bd0ff4db450040a6de175ead93cfda475994..12b68201d53a6d8f67460a83f8622bc565d02d4b 100644
--- a/Source/core/paint/InlineTextBoxPainter.cpp
+++ b/Source/core/paint/InlineTextBoxPainter.cpp
@@ -99,7 +99,7 @@ void InlineTextBoxPainter::paint(const PaintInfo& paintInfo, const LayoutPoint&
     }
 
     GraphicsContext* context = paintInfo.context;
-    RenderStyle* styleToUse = m_inlineTextBox.renderer().style(m_inlineTextBox.isFirstLineStyle());
+    const RenderStyle* styleToUse = m_inlineTextBox.renderer().style(m_inlineTextBox.isFirstLineStyle());
 
     adjustedPaintOffset.move(0, styleToUse->isHorizontalWritingMode() ? LayoutUnit() : -m_inlineTextBox.logicalHeight().toLayoutUnit());
 
@@ -258,7 +258,7 @@ unsigned InlineTextBoxPainter::underlinePaintEnd(const CompositionUnderline& und
     return paintEnd;
 }
 
-void InlineTextBoxPainter::paintCompositionBackgrounds(GraphicsContext* pt, const FloatPoint& boxOrigin, RenderStyle* style, const Font& font, bool useCustomUnderlines)
+void InlineTextBoxPainter::paintCompositionBackgrounds(GraphicsContext* pt, const FloatPoint& boxOrigin, const RenderStyle* style, const Font& font, bool useCustomUnderlines)
 {
     if (useCustomUnderlines) {
         // Paint custom background highlights for compositions.
@@ -277,7 +277,7 @@ void InlineTextBoxPainter::paintCompositionBackgrounds(GraphicsContext* pt, cons
     }
 }
 
-void InlineTextBoxPainter::paintSingleCompositionBackgroundRun(GraphicsContext* context, const FloatPoint& boxOrigin, RenderStyle* style, const Font& font, Color backgroundColor, int startPos, int endPos)
+void InlineTextBoxPainter::paintSingleCompositionBackgroundRun(GraphicsContext* context, const FloatPoint& boxOrigin, const RenderStyle* style, const Font& font, Color backgroundColor, int startPos, int endPos)
 {
     int sPos = std::max(startPos - static_cast<int>(m_inlineTextBox.start()), 0);
     int ePos = std::min(endPos - static_cast<int>(m_inlineTextBox.start()), static_cast<int>(m_inlineTextBox.len()));
@@ -290,7 +290,7 @@ void InlineTextBoxPainter::paintSingleCompositionBackgroundRun(GraphicsContext*
     context->drawHighlightForText(font, m_inlineTextBox.constructTextRun(style, font), localOrigin, selHeight, backgroundColor, sPos, ePos);
 }
 
-void InlineTextBoxPainter::paintDocumentMarkers(GraphicsContext* pt, const FloatPoint& boxOrigin, RenderStyle* style, const Font& font, bool background)
+void InlineTextBoxPainter::paintDocumentMarkers(GraphicsContext* pt, const FloatPoint& boxOrigin, const RenderStyle* style, const Font& font, bool background)
 {
     if (!m_inlineTextBox.renderer().node())
         return;
@@ -358,7 +358,7 @@ static GraphicsContext::DocumentMarkerLineStyle lineStyleForMarkerType(DocumentM
     }
 }
 
-void InlineTextBoxPainter::paintDocumentMarker(GraphicsContext* pt, const FloatPoint& boxOrigin, DocumentMarker* marker, RenderStyle* style, const Font& font, bool grammar)
+void InlineTextBoxPainter::paintDocumentMarker(GraphicsContext* pt, const FloatPoint& boxOrigin, DocumentMarker* marker, const RenderStyle* style, const Font& font, bool grammar)
 {
     // Never print spelling/grammar markers (5327887)
     if (m_inlineTextBox.renderer().document().printing())
@@ -426,7 +426,7 @@ void InlineTextBoxPainter::paintDocumentMarker(GraphicsContext* pt, const FloatP
     pt->drawLineForDocumentMarker(FloatPoint(boxOrigin.x() + start, boxOrigin.y() + underlineOffset), width, lineStyleForMarkerType(marker->type()));
 }
 
-void InlineTextBoxPainter::paintSelection(GraphicsContext* context, const FloatPoint& boxOrigin, RenderStyle* style, const Font& font, Color textColor)
+void InlineTextBoxPainter::paintSelection(GraphicsContext* context, const FloatPoint& boxOrigin, const RenderStyle* style, const Font& font, Color textColor)
 {
     // See if we have a selection to paint at all.
     int sPos, ePos;
@@ -708,7 +708,7 @@ void InlineTextBoxPainter::paintDecoration(GraphicsContext* context, const Float
     // Use a special function for underlines to get the positioning exactly right.
     bool isPrinting = m_inlineTextBox.renderer().document().printing();
 
-    RenderStyle* styleToUse = m_inlineTextBox.renderer().style(m_inlineTextBox.isFirstLineStyle());
+    const RenderStyle* styleToUse = m_inlineTextBox.renderer().style(m_inlineTextBox.isFirstLineStyle());
     int baseline = styleToUse->fontMetrics().ascent();
 
     // Set the thick of the line to be 10% (or something else ?)of the computed font size and not less than 1px.
@@ -774,7 +774,7 @@ void InlineTextBoxPainter::paintCompositionUnderline(GraphicsContext* ctx, const
     ctx->drawLineForText(FloatPoint(boxOrigin.x() + start, boxOrigin.y() + m_inlineTextBox.logicalHeight() - lineThickness), width, m_inlineTextBox.renderer().document().printing());
 }
 
-void InlineTextBoxPainter::paintTextMatchMarker(GraphicsContext* pt, const FloatPoint& boxOrigin, DocumentMarker* marker, RenderStyle* style, const Font& font)
+void InlineTextBoxPainter::paintTextMatchMarker(GraphicsContext* pt, const FloatPoint& boxOrigin, DocumentMarker* marker, const RenderStyle* style, const Font& font)
 {
     // Use same y positioning and height as for selection, so that when the selection and this highlight are on
     // the same word there are no pieces sticking out.