When there are no more stylesheets schedule the recalc async

Source/core/dom/DocumentStyleSheetCollection.h

 /*
  * 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) 2011 Google Inc. All rights reserved.
  *
@@ skipping 10 matching lines @@
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef DocumentStyleSheetCollection_h
 #define DocumentStyleSheetCollection_h
 
+#include "Document.h"
 #include <wtf/FastAllocBase.h>
 #include <wtf/ListHashSet.h>
 #include <wtf/RefPtr.h>
 #include <wtf/Vector.h>
 #include <wtf/text/WTFString.h>
 
 namespace WebCore {
 
 class CSSStyleSheet;
 class Document;
@@ skipping 25 matching lines @@
     void clearPageUserSheet();
     void updatePageUserSheet();
     void invalidateInjectedStyleSheetCache();
     void updateInjectedStyleSheetCache() const;
 
     void addAuthorSheet(PassRefPtr<StyleSheetContents> authorSheet);
     void addUserSheet(PassRefPtr<StyleSheetContents> userSheet);
 
     bool needsUpdateActiveStylesheetsOnStyleRecalc() const { return m_needsUpdateActiveStylesheetsOnStyleRecalc; }
 
-    enum UpdateFlag { FullUpdate, OptimizedUpdate };
-    bool updateActiveStyleSheets(UpdateFlag);
+    bool updateActiveStyleSheets(StyleResolverUpdateMode);
 
     String preferredStylesheetSetName() const { return m_preferredStylesheetSetName; }
     String selectedStylesheetSetName() const { return m_selectedStylesheetSetName; }
     void setPreferredStylesheetSetName(const String& name) { m_preferredStylesheetSetName = name; }
     void setSelectedStylesheetSetName(const String& name) { m_selectedStylesheetSetName = name; }
 
     void addPendingSheet() { m_pendingStylesheets++; }
     enum RemovePendingSheetNotificationType {
         RemovePendingSheetNotifyImmediately,
         RemovePendingSheetNotifyLater
@@ skipping 14 matching lines @@
 
     void combineCSSFeatureFlags();
     void resetCSSFeatureFlags();
 
     void reportMemoryUsage(MemoryObjectInfo*) const;
 
 private:
     DocumentStyleSheetCollection(Document*);
 
     void collectActiveStyleSheets(Vector<RefPtr<StyleSheet> >&);
-    enum StyleResolverUpdateType {
-        Reconstruct,
-        Reset,
-        Additive
-    };
-    void analyzeStyleSheetChange(UpdateFlag, const Vector<RefPtr<CSSStyleSheet> >& newStylesheets, StyleResolverUpdateType&, bool& requiresFullStyleRecalc);
+
+    enum UpdateAction { Reconstruct, Reset, Append };
+    UpdateAction analyzeStyleSheetChange(StyleResolverUpdateMode, const Vector<RefPtr<CSSStyleSheet> >& newStylesheets, bool& requiresFullStyleRecalc);
 
     Document* m_document;
 
     Vector<RefPtr<StyleSheet> > m_styleSheetsForStyleSheetList;
     Vector<RefPtr<CSSStyleSheet> > m_activeAuthorStyleSheets;
 
     // Track the number of currently loading top-level stylesheets needed for rendering.
     // Sheets loaded using the @import directive are not included in this count.
     // We use this count of pending sheets to detect when we can begin attaching
     // elements and when it is safe to execute scripts.
@@ skipping 23 matching lines @@
     bool m_usesFirstLetterRules;
     bool m_usesBeforeAfterRules;
     bool m_usesBeforeAfterRulesOverride;
     bool m_usesRemUnits;
 };
 
 }
 
 #endif