Make RenderObject::style() return a const object

Source/core/paint/InlinePainter.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/paint/InlinePainter.h"
 
 #include "core/layout/LayoutTheme.h"
 #include "core/paint/BoxPainter.h"
 #include "core/paint/GraphicsContextAnnotator.h"
 #include "core/paint/LineBoxListPainter.h"
 #include "core/paint/ObjectPainter.h"
 #include "core/paint/RenderDrawingRecorder.h"
 #include "core/rendering/PaintInfo.h"
 #include "core/rendering/RenderBlock.h"
 #include "core/rendering/RenderInline.h"
 #include "core/rendering/RootInlineBox.h"
 #include "platform/geometry/LayoutPoint.h"
 
 namespace blink {
 
 void InlinePainter::paint(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
     ANNOTATE_GRAPHICS_CONTEXT(paintInfo, &m_renderInline);
     LineBoxListPainter(*m_renderInline.lineBoxes()).paint(&m_renderInline, paintInfo, paintOffset);
 }
 
 void InlinePainter::paintOutline(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
-    RenderStyle* styleToUse = m_renderInline.style();
+    const RenderStyle* styleToUse = m_renderInline.style();
     if (!styleToUse->hasOutline())
         return;
 
     LayoutRect bounds;
     if (RuntimeEnabledFeatures::slimmingPaintEnabled()) {
         // FIXME: Use tighter bounds.
         RenderBlock* cb = m_renderInline.containingBlock();
         bounds = cb->visualOverflowRect();
         bounds.moveBy(paintOffset);
     }
@@ skipping 35 matching lines @@
     for (unsigned i = 1; i < rects.size() - 1; i++)
         paintOutlineForLine(graphicsContext, paintOffset, rects.at(i - 1), rects.at(i), rects.at(i + 1), outlineColor);
 
     if (useTransparencyLayer)
         graphicsContext->endLayer();
 }
 
 void InlinePainter::paintOutlineForLine(GraphicsContext* graphicsContext, const LayoutPoint& paintOffset,
     const LayoutRect& lastline, const LayoutRect& thisline, const LayoutRect& nextline, const Color outlineColor)
 {
-    RenderStyle* styleToUse = m_renderInline.style();
+    const RenderStyle* styleToUse = m_renderInline.style();
     int outlineWidth = styleToUse->outlineWidth();
     EBorderStyle outlineStyle = styleToUse->outlineStyle();
 
     bool antialias = BoxPainter::shouldAntialiasLines(graphicsContext);
 
     int offset = m_renderInline.style()->outlineOffset();
 
     LayoutRect box(LayoutPoint(paintOffset.x() + thisline.x() - offset, paintOffset.y() + thisline.y() - offset),
         LayoutSize(thisline.width() + offset, thisline.height() + offset));
 
@@ skipping 93 matching lines @@
             pixelSnappedBox.maxX() + outlineWidth,
             pixelSnappedBox.maxY() + outlineWidth,
             BSBottom, outlineColor, outlineStyle,
             outlineWidth,
             outlineWidth,
             antialias);
     }
 }
 
 } // namespace blink