Remove global list map of TreeScope to StyleSheetCollection.

sky/engine/core/dom/TreeScope.h

 /*
  * Copyright (C) 2011 Google Inc. All Rights Reserved.
  * Copyright (C) 2012 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 22 matching lines @@
 
 namespace blink {
 
 class ContainerNode;
 class DOMSelection;
 class Document;
 class Element;
 class HitTestResult;
 class Node;
 class ScopedStyleResolver;
+class StyleSheetCollection;
 
 // A class which inherits both Node and TreeScope must call clearRareData() in its destructor
 // so that the Node destructor no longer does problematic NodeList cache manipulation in
 // the destructor.
 class TreeScope {
 public:
     TreeScope* parentTreeScope() const { return m_parentTreeScope; }
 
     bool isInclusiveOlderSiblingShadowRootOrAncestorTreeScopeOf(const TreeScope&) const;
 
@@ skipping 54 matching lines @@
 
     bool isInclusiveAncestorOf(const TreeScope&) const;
     unsigned short comparePosition(const TreeScope&) const;
 
     const TreeScope* commonAncestorTreeScope(const TreeScope& other) const;
     TreeScope* commonAncestorTreeScope(TreeScope& other);
 
     Element* getElementByAccessKey(const String& key) const;
 
     ScopedStyleResolver& scopedStyleResolver() const { return *m_scopedStyleResolver; }
+    StyleSheetCollection& styleSheets() const { return *m_styleSheets; }
 
 protected:
     TreeScope(ContainerNode&, Document&);
     explicit TreeScope(Document&);
     virtual ~TreeScope();
 
 #if !ENABLE(OILPAN)
     void destroyTreeScopeData();
 #endif
 
@@ skipping 21 matching lines @@
 #endif
 #endif
 
     bool rootNodeHasTreeSharedParent() const;
 
     RawPtr<ContainerNode> m_rootNode;
     RawPtr<Document> m_document;
     RawPtr<TreeScope> m_parentTreeScope;
 
     OwnPtr<ScopedStyleResolver> m_scopedStyleResolver;
+    OwnPtr<StyleSheetCollection> m_styleSheets;
 
     OwnPtr<DocumentOrderedMap> m_elementsById;
     OwnPtr<DocumentOrderedMap> m_imageMapsByName;
     OwnPtr<DocumentOrderedMap> m_labelsByForAttribute;
 
     mutable RefPtr<DOMSelection> m_selection;
 
     int m_guardRefCount;
 };
 
 DEFINE_COMPARISON_OPERATORS_WITH_REFERENCES(TreeScope)
 
 HitTestResult hitTestInDocument(const Document*, int x, int y);
 TreeScope* commonTreeScope(Node*, Node*);
 
 } // namespace blink
 
 #endif  // SKY_ENGINE_CORE_DOM_TREESCOPE_H_