Collect active stylesheets and and apply asynchronously.

third_party/WebKit/Source/core/dom/DocumentStyleSheetCollector.h

 /*
  * 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
@@ skipping 10 matching lines @@
  * 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 DocumentStyleSheetCollector_h
 #define DocumentStyleSheetCollector_h
 
 #include "bindings/core/v8/TraceWrapperMember.h"
+#include "core/css/ActiveStyleSheets.h"
 #include "platform/heap/Handle.h"
 #include "wtf/HashSet.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
-class CSSStyleSheet;
 class Document;
 class StyleSheet;
 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(StyleSheetCollection*,
                               HeapVector<Member<StyleSheet>>*,
                               HeapHashSet<Member<Document>>*);
   ~DocumentStyleSheetCollector();
 
-  void appendActiveStyleSheets(
-      const HeapVector<TraceWrapperMember<CSSStyleSheet>>&);
-  void appendActiveStyleSheet(CSSStyleSheet*);
+  void appendActiveStyleSheet(const ActiveStyleSheet&);
   void appendSheetForList(StyleSheet*);
 
   bool hasVisited(Document* document) const {
     return m_visitedDocuments->contains(document);
   }
   void willVisit(Document* document) { m_visitedDocuments->add(document); }
 
  private:
   Member<StyleSheetCollection> m_collection;
   HeapVector<Member<StyleSheet>>* m_styleSheetsForStyleSheetList;
@@ skipping 12 matching lines @@
 class ImportedDocumentStyleSheetCollector final
     : public DocumentStyleSheetCollector {
  public:
   ImportedDocumentStyleSheetCollector(DocumentStyleSheetCollector&,
                                       HeapVector<Member<StyleSheet>>&);
 };
 
 }  // namespace blink
 
 #endif  // DocumentStyleSheetCollector_h