Merge StyleSheet into CSSStyleSheet.

sky/engine/core/dom/DocumentStyleSheetCollection.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
@@ skipping 32 matching lines @@
 }
 
 void DocumentStyleSheetCollection::collectStyleSheetsFromCandidates(StyleEngine* engine, DocumentStyleSheetCollector& collector)
 {
     DocumentOrderedList::iterator begin = m_styleSheetCandidateNodes.begin();
     DocumentOrderedList::iterator end = m_styleSheetCandidateNodes.end();
     for (DocumentOrderedList::iterator it = begin; it != end; ++it) {
         Node* n = *it;
         StyleSheetCandidate candidate(*n);
 
-        StyleSheet* sheet = candidate.sheet();
+        CSSStyleSheet* sheet = candidate.sheet();
         if (!sheet)
             continue;
 
         collector.appendSheetForList(sheet);
         if (candidate.canBeActivated())
-            collector.appendActiveStyleSheet(toCSSStyleSheet(sheet));
+            collector.appendActiveStyleSheet(sheet);
     }
 }
 
 void DocumentStyleSheetCollection::collectStyleSheets(StyleEngine* engine, DocumentStyleSheetCollector& collector)
 {
     ASSERT(document().styleEngine() == engine);
     collector.appendActiveStyleSheets(engine->documentAuthorStyleSheets());
     collectStyleSheetsFromCandidates(engine, collector);
 }
 
@@ skipping 11 matching lines @@
     // TODO(esprehn): This is terrible and not needed in Sky, we should mark
     // specific tree scopes dirty instead.
     document().setNeedsStyleRecalc(SubtreeStyleChange);
 
     collection.swap(*this);
 
     updateUsesRemUnits();
 }
 
 }