Setting preferred stylesheet simplified.

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

Index: third_party/WebKit/Source/core/dom/StyleEngine.h
diff --git a/third_party/WebKit/Source/core/dom/StyleEngine.h b/third_party/WebKit/Source/core/dom/StyleEngine.h
index 9cd0ab14b152570f0c7e86dd25c4e07bb50e3948..aac69e7511dc297474b44008098a7bd54ea4ad5f 100644
--- a/third_party/WebKit/Source/core/dom/StyleEngine.h
+++ b/third_party/WebKit/Source/core/dom/StyleEngine.h
@@ -124,14 +124,13 @@ class CORE_EXPORT StyleEngine final
   void updateActiveStyle();
   void markAllTreeScopesDirty() { m_allTreeScopesDirty = true; }
 
-  enum ActiveSheetsUpdate { DontUpdateActiveSheets, UpdateActiveSheets };
   String preferredStylesheetSetName() const {
     return m_preferredStylesheetSetName;
   }
   String selectedStylesheetSetName() const {
     return m_selectedStylesheetSetName;
   }
-  void setPreferredStylesheetSetNameIfNotSet(const String&, ActiveSheetsUpdate);
+  void setPreferredStylesheetSetNameIfNotSet(const String&);
   void setSelectedStylesheetSetName(const String&);
   void setHttpDefaultStyle(const String&);