Make RenderObject::style() return a const object

Source/core/rendering/EllipsisBox.cpp

 /**
  * Copyright (C) 2003, 2006 Apple Computer, 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 41 matching lines @@
     // It does not actually move the link.
     InlineBox* anchorBox = lastLine->lastChild();
     if (!anchorBox || !anchorBox->renderer().style()->isLink())
         return 0;
 
     return anchorBox;
 }
 
 IntRect EllipsisBox::selectionRect()
 {
-    RenderStyle* style = renderer().style(isFirstLineStyle());
+    const RenderStyle* style = renderer().style(isFirstLineStyle());
     const Font& font = style->font();
     return enclosingIntRect(font.selectionRectForText(constructTextRun(&renderer(), font, m_str, style, TextRun::AllowTrailingExpansion), IntPoint(logicalLeft(), logicalTop() + root().selectionTopAdjustedForPrecedingBlock()), root().selectionHeightAdjustedForPrecedingBlock()));
 }
 
 bool EllipsisBox::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, LayoutUnit lineTop, LayoutUnit lineBottom)
 {
     // FIXME: the call to roundedLayoutPoint() below is temporary and should be removed once
     // the transition to LayoutUnit-based types is complete (crbug.com/321237)
     LayoutPoint adjustedLocation = accumulatedOffset + topLeft().roundedLayoutPoint();
 
     // Hit test the markup box.
     if (InlineBox* markupBox = this->markupBox()) {
-        RenderStyle* style = renderer().style(isFirstLineStyle());
+        const RenderStyle* style = renderer().style(isFirstLineStyle());
         LayoutUnit mtx = adjustedLocation.x() + m_logicalWidth - markupBox->x();
         LayoutUnit mty = adjustedLocation.y() + style->fontMetrics().ascent() - (markupBox->y() + markupBox->renderer().style(isFirstLineStyle())->fontMetrics().ascent());
         if (markupBox->nodeAtPoint(request, result, locationInContainer, LayoutPoint(mtx, mty), lineTop, lineBottom)) {
             renderer().updateHitTestResult(result, locationInContainer.point() - LayoutSize(mtx, mty));
             return true;
         }
     }
 
     FloatPointWillBeLayoutPoint boxOrigin = locationIncludingFlipping();
     boxOrigin.moveBy(accumulatedOffset);
     FloatRectWillBeLayoutRect boundsRect(boxOrigin, size());
     if (visibleToHitTestRequest(request) && boundsRect.intersects(FloatRectWillBeLayoutRect(HitTestLocation::rectForPoint(locationInContainer.point(), 0, 0, 0, 0)))) {
         renderer().updateHitTestResult(result, locationInContainer.point() - toLayoutSize(adjustedLocation));
         // FIXME: the call to rawValue() below is temporary and should be removed once the transition
         // to LayoutUnit-based types is complete (crbug.com/321237)
         if (!result.addNodeToRectBasedTestResult(renderer().node(), request, locationInContainer, boundsRect.rawValue()))
             return true;
     }
 
     return false;
 }
 
 } // namespace blink