Make RenderObject::style() return a const object

Source/core/dom/Text.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. 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
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 297 matching lines @@
     return true;
 }
 
 static bool isSVGText(Text* text)
 {
     Node* parentOrShadowHostNode = text->parentOrShadowHostNode();
     ASSERT(parentOrShadowHostNode);
     return parentOrShadowHostNode->isSVGElement() && !isSVGForeignObjectElement(*parentOrShadowHostNode);
 }
 
-RenderText* Text::createTextRenderer(LayoutStyle* style)
+RenderText* Text::createTextRenderer(const LayoutStyle& style)
 {
     if (isSVGText(this))
         return new LayoutSVGInlineText(this, dataImpl());
 
-    if (style->hasTextCombine())
+    if (style.hasTextCombine())
         return new RenderCombineText(this, dataImpl());
 
     return new RenderText(this, dataImpl());
 }
 
 void Text::attach(const AttachContext& context)
 {
     if (ContainerNode* renderingParent = NodeRenderingTraversal::parent(*this)) {
         if (LayoutObject* parentRenderer = renderingParent->renderer()) {
             if (textRendererIsNeeded(*parentRenderer->style(), *parentRenderer))
@@ skipping 42 matching lines @@
         if (this->renderer())
             reattachWhitespaceSiblingsIfNeeded(nextTextSibling);
     }
 }
 
 // If a whitespace node had no renderer and goes through a recalcStyle it may
 // need to create one if the parent style now has white-space: pre.
 bool Text::needsWhitespaceRenderer()
 {
     ASSERT(!renderer());
-    if (LayoutStyle* style = parentLayoutStyle())
+    if (const LayoutStyle* style = parentLayoutStyle())
         return style->preserveNewline();
     return false;
 }
 
 void Text::updateTextRenderer(unsigned offsetOfReplacedData, unsigned lengthOfReplacedData, RecalcStyleBehavior recalcStyleBehavior)
 {
     if (!inActiveDocument())
         return;
     RenderText* textRenderer = renderer();
     if (!textRenderer || !textRendererIsNeeded(*textRenderer->style(), *textRenderer->parent())) {
@@ skipping 25 matching lines @@
             result.appendLiteral("; ");
         result.appendLiteral("value=");
         result.append(s);
     }
 
     strncpy(buffer, result.toString().utf8().data(), length - 1);
 }
 #endif
 
 } // namespace blink