[wip] simplify -webkit-appearance adjust step

Source/core/css/resolver/CascadedValues.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CascadedValues_h
 #define CascadedValues_h
 
 #include "core/CSSPropertyNames.h"
 #include "core/css/RuleSet.h"
 #include "core/css/SelectorChecker.h"
 #include "core/rendering/style/RenderStyleConstants.h"
 #include "platform/text/TextDirection.h"
 #include "platform/text/WritingMode.h"
 
 namespace blink {
 
 class CSSValue;
 class MatchResult;
 class StyleResolverState;
 class StyleRule;
 
 class CascadedValues {
     STACK_ALLOCATED();
 public:
-    CascadedValues(StyleResolverState&, const MatchResult&, bool onlyAddUARules = false);
+    CascadedValues(StyleResolverState&, const MatchResult&);
     void applyValues(CSSPropertyID first, CSSPropertyID last, bool inheritedOnly = false);
 
+    bool valuesUnchangedForWebkitAppearance(const MatchResult&);
+
 private:
+    enum WebkitAppearanceConstructorType { WebkitAppearanceConstructor };
+    CascadedValues(StyleResolverState&, const MatchResult&, WebkitAppearanceConstructorType);
     void addMatchResult(const MatchResult&, CSSPropertyID firstId, CSSPropertyID lastId);
     void addMatchResultRange(const MatchResult&, bool isImportant, int firstIndex, int lastIndex, CSSPropertyID firstId, CSSPropertyID lastId);
     void addStylePropertySet(const StylePropertySet*, const StyleRule*, bool isImportant, CSSPropertyID first, CSSPropertyID last, PropertyWhitelistType, SelectorChecker::LinkMatchMask);
     void addValue(CSSPropertyID, CSSValue*, const StyleRule*, SelectorChecker::LinkMatchMask);
     void addAllProperty(CSSValue*, SelectorChecker::LinkMatchMask);
 
     CSSValue*& cascadedValue(CSSPropertyID id)
     {
         return m_values[id - firstCSSProperty];
     }
     CSSValue*& cascadedVisitedLinkValue(CSSPropertyID id)
     {
         return m_visitedLinkValues[id - firstCSSProperty];
     }
 
     CSSValue* m_values[numCSSProperties];
     CSSValue* m_visitedLinkValues[numCSSProperties];
 
     StyleResolverState& m_state;
     TextDirection m_direction;
     WritingMode m_writingMode;
 };
 
 } // namespace blink
 
 #endif // CascadedValues_h