Make RenderObject::style() return a const object

Source/core/dom/PseudoElement.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 102 matching lines @@
 void PseudoElement::attach(const AttachContext& context)
 {
     ASSERT(!renderer());
 
     Element::attach(context);
 
     RenderObject* renderer = this->renderer();
     if (!renderer)
         return;
 
-    RenderStyle* style = renderer->style();
+    RenderStyle* style = renderer->deprecatedMutableStyle();
     if (style->styleType() != BEFORE && style->styleType() != AFTER)
         return;
     ASSERT(style->contentData());
 
     for (const ContentData* content = style->contentData(); content; content = content->next()) {
         RenderObject* child = content->createRenderer(document(), style);
         if (renderer->isChildAllowed(child, style)) {
             renderer->addChild(child);
             if (child->isQuote())
                 toRenderQuote(child)->attachQuote();
@@ skipping 13 matching lines @@
         return;
 
     // The renderers inside pseudo elements are anonymous so they don't get notified of recalcStyle and must have
     // the style propagated downward manually similar to RenderObject::propagateStyleToAnonymousChildren.
     RenderObject* renderer = this->renderer();
     for (RenderObject* child = renderer->nextInPreOrder(renderer); child; child = child->nextInPreOrder(renderer)) {
         // 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->deprecatedMutableStyle());
     }
 }
 
 } // namespace