Delete StyleSheetList and support code.

sky/engine/core/dom/DocumentStyleSheetCollector.h

Index: sky/engine/core/dom/DocumentStyleSheetCollector.h
diff --git a/sky/engine/core/dom/DocumentStyleSheetCollector.h b/sky/engine/core/dom/DocumentStyleSheetCollector.h
deleted file mode 100644
index 922910e473dc6f8433aa54777385b67d8aa38a9f..0000000000000000000000000000000000000000
--- a/sky/engine/core/dom/DocumentStyleSheetCollector.h
+++ /dev/null
@@ -1,79 +0,0 @@
-/*
- * Copyright (C) 2014 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
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef SKY_ENGINE_CORE_DOM_DOCUMENTSTYLESHEETCOLLECTOR_H_
-#define SKY_ENGINE_CORE_DOM_DOCUMENTSTYLESHEETCOLLECTOR_H_
-
-#include "sky/engine/platform/heap/Handle.h"
-#include "sky/engine/wtf/HashSet.h"
-#include "sky/engine/wtf/RefPtr.h"
-#include "sky/engine/wtf/Vector.h"
-
-namespace blink {
-
-class Document;
-class CSSStyleSheet;
-class StyleSheetCollection;
-
-class DocumentStyleSheetCollector {
-    // This class contains references to two on-heap collections, therefore
-    // it's unhealthy to have it anywhere but on the stack, where stack
-    // scanning will keep them alive.
-    STACK_ALLOCATED();
-public:
-    friend class ImportedDocumentStyleSheetCollector;
-
-    DocumentStyleSheetCollector(Vector<RefPtr<CSSStyleSheet> >& sheetsForList, Vector<RefPtr<CSSStyleSheet> >& activeList, HashSet<RawPtr<Document> >&);
-    ~DocumentStyleSheetCollector();
-
-    void appendActiveStyleSheets(const Vector<RefPtr<CSSStyleSheet> >&);
-    void appendActiveStyleSheet(CSSStyleSheet*);
-    void appendSheetForList(CSSStyleSheet*);
-
-    bool hasVisited(Document* document) const { return m_visitedDocuments.contains(document); }
-    void willVisit(Document* document) { m_visitedDocuments.add(document); }
-
-private:
-    Vector<RefPtr<CSSStyleSheet> >& m_styleSheetsForStyleSheetList;
-    Vector<RefPtr<CSSStyleSheet> >& m_activeAuthorStyleSheets;
-    HashSet<RawPtr<Document> >& m_visitedDocuments;
-};
-
-class ActiveDocumentStyleSheetCollector final : public DocumentStyleSheetCollector {
-public:
-    ActiveDocumentStyleSheetCollector(StyleSheetCollection&);
-private:
-    HashSet<RawPtr<Document> > m_visitedDocuments;
-};
-
-class ImportedDocumentStyleSheetCollector final : public DocumentStyleSheetCollector {
-public:
-    ImportedDocumentStyleSheetCollector(DocumentStyleSheetCollector&, Vector<RefPtr<CSSStyleSheet> >&);
-};
-
-} // namespace blink
-
-#endif  // SKY_ENGINE_CORE_DOM_DOCUMENTSTYLESHEETCOLLECTOR_H_