Make RenderObject::style() return a const object

Source/core/dom/FirstLetterPseudoElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * 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
@@ skipping 216 matching lines @@
 LayoutStyle* FirstLetterPseudoElement::styleForFirstLetter(LayoutObject* rendererContainer)
 {
     ASSERT(rendererContainer);
 
     LayoutObject* styleContainer = parentOrShadowHostElement()->renderer();
     ASSERT(styleContainer);
 
     // We always force the pseudo style to recompute as the first-letter style
     // computed by the style container may not have taken the renderers styles
     // into account.
-    styleContainer->style()->removeCachedPseudoStyle(FIRST_LETTER);
+    styleContainer->mutableStyleRef().removeCachedPseudoStyle(FIRST_LETTER);
 
     LayoutStyle* pseudoStyle = styleContainer->getCachedPseudoStyle(FIRST_LETTER, rendererContainer->firstLineStyle());
     ASSERT(pseudoStyle);
 
     return pseudoStyle;
 }
 
 void FirstLetterPseudoElement::attachFirstLetterTextRenderers()
 {
     LayoutObject* nextRenderer = FirstLetterPseudoElement::firstLetterTextRenderer(*this);
@@ skipping 11 matching lines @@
 
     // FIXME: This would already have been calculated in firstLetterRenderer. Can we pass the length through?
     unsigned length = FirstLetterPseudoElement::firstLetterLength(oldText);
 
     // Construct a text fragment for the text after the first letter.
     // This text fragment might be empty.
     RenderTextFragment* remainingText =
         new RenderTextFragment(nextRenderer->node() ? nextRenderer->node() : &nextRenderer->document(), oldText.impl(), length, oldText.length() - length);
     remainingText->setFirstLetterPseudoElement(this);
     remainingText->setIsRemainingTextRenderer(true);
-    remainingText->setStyle(nextRenderer->style());
+    remainingText->setStyle(nextRenderer->mutableStyle());
 
     if (remainingText->node())
         remainingText->node()->setRenderer(remainingText);
 
     m_remainingTextRenderer = remainingText;
 
     LayoutObject* nextSibling = renderer()->nextSibling();
     renderer()->parent()->addChild(remainingText, nextSibling);
 
     // Construct text fragment for the first letter.
@@ skipping 19 matching lines @@
         if (child->style()->styleType() == FIRST_LETTER && m_remainingTextRenderer) {
             if (LayoutStyle* pseudoStyle = styleForFirstLetter(m_remainingTextRenderer->parent()))
                 child->setPseudoStyle(pseudoStyle);
             continue;
         }
 
         // We only manage the style for the generated content items.
         if (!child->isText() && !child->isQuote() && !child->isImage())
             continue;
 
-        child->setPseudoStyle(renderer->style());
+        child->setPseudoStyle(renderer->mutableStyle());
     }
 }
 
 } // namespace blink