Make RenderObject::style() return a const object

Source/core/css/resolver/StyleAdjuster.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 133 matching lines @@
             if (RuntimeEnabledFeatures::cssCompositingEnabled())
                 return true;
             break;
         default:
             break;
         }
     }
     return false;
 }
 
-void StyleAdjuster::adjustRenderStyle(RenderStyle* style, RenderStyle* parentStyle, Element *e, const CachedUAStyle* cachedUAStyle)
+void StyleAdjuster::adjustRenderStyle(RenderStyle* style, const RenderStyle* parentStyle, Element *e, const CachedUAStyle* cachedUAStyle)
 {
     ASSERT(parentStyle);
 
     if (style->display() != NONE) {
         if (e && e->isHTMLElement())
             adjustStyleForHTMLElement(style, parentStyle, toHTMLElement(*e));
 
         // Per the spec, position 'static' and 'relative' in the top layer compute to 'absolute'.
         if (isInTopLayer(e, style) && (style->position() == StaticPosition || style->position() == RelativePosition))
             style->setPosition(AbsolutePosition);
@@ skipping 164 matching lines @@
     if (style.alignContent() == ContentPositionAuto && style.alignContentDistribution() == ContentDistributionDefault) {
         if (style.isDisplayFlexibleOrGridBox()) {
             if (style.isDisplayFlexibleBox())
                 style.setAlignContentDistribution(ContentDistributionStretch);
             else
                 style.setAlignContent(ContentPositionStart);
         }
     }
 }
 
-void StyleAdjuster::adjustStyleForHTMLElement(RenderStyle* style, RenderStyle* parentStyle, HTMLElement& element)
+void StyleAdjuster::adjustStyleForHTMLElement(RenderStyle* style, const RenderStyle* parentStyle, HTMLElement& element)
 {
     // <div> and <span> are the most common elements on the web, we skip all the work for them.
     if (isHTMLDivElement(element) || isHTMLSpanElement(element))
         return;
 
     if (isHTMLTableCellElement(element)) {
         // If we have a <td> that specifies a float property, in quirks mode we just drop the float property.
         // FIXME: Why is this only <td> and not <th>?
         if (element.hasTagName(tdTag) && m_useQuirksModeStyles) {
             style->setDisplay(TABLE_CELL);
@@ skipping 100 matching lines @@
             style->setOverflowY(OVISIBLE);
     }
 
     // Menulists should have visible overflow
     if (style->appearance() == MenulistPart) {
         style->setOverflowX(OVISIBLE);
         style->setOverflowY(OVISIBLE);
     }
 }
 
-void StyleAdjuster::adjustStyleForDisplay(RenderStyle* style, RenderStyle* parentStyle)
+void StyleAdjuster::adjustStyleForDisplay(RenderStyle* style, const RenderStyle* parentStyle)
 {
     if (style->display() == BLOCK && !style->isFloating())
         return;
 
     // FIXME: Don't support this mutation for pseudo styles like first-letter or first-line, since it's not completely
     // clear how that should work.
     if (style->display() == INLINE && style->styleType() == NOPSEUDO && style->writingMode() != parentStyle->writingMode())
         style->setDisplay(INLINE_BLOCK);
 
     // After performing the display mutation, check table rows. We do not honor position: relative table rows or cells.
@@ skipping 17 matching lines @@
     if (style->writingMode() != TopToBottomWritingMode && (style->display() == BOX || style->display() == INLINE_BOX))
         style->setWritingMode(TopToBottomWritingMode);
 
     if (parentStyle->isDisplayFlexibleOrGridBox()) {
         style->setFloating(NoFloat);
         style->setDisplay(equivalentBlockDisplay(style->display(), style->isFloating(), !m_useQuirksModeStyles));
     }
 }
 
 }