Cascade declared property values instead of applying values on top of each other

Source/core/css/resolver/StyleResolverState.h

Index: Source/core/css/resolver/StyleResolverState.h
diff --git a/Source/core/css/resolver/StyleResolverState.h b/Source/core/css/resolver/StyleResolverState.h
index c61435713f58d2e162e4be9a366ce3c0b2517f2a..9918765ff51d8ac095341f0bf774049922119b54 100644
--- a/Source/core/css/resolver/StyleResolverState.h
+++ b/Source/core/css/resolver/StyleResolverState.h
@@ -76,9 +76,6 @@ public:
     const RenderStyle* parentStyle() const { return m_parentStyle.get(); }
     RenderStyle* parentStyle() { return m_parentStyle.get(); }
 
-    void setCurrentRule(StyleRule* currentRule) { m_currentRule = currentRule; }
-    const StyleRule* currentRule() const { return m_currentRule; }
-
     // FIXME: These are effectively side-channel "out parameters" for the various
     // map functions. When we map from CSS to style objects we use this state object
     // to track various meta-data about that mapping (e.g. if it's cache-able).
@@ -92,9 +89,6 @@ public:
     // Holds all attribute names found while applying "content" properties that contain an "attr()" value.
     Vector<AtomicString>& contentAttrValues() { return m_contentAttrValues; }
 
-    void setLineHeightValue(CSSValue* value) { m_lineHeightValue = value; }
-    CSSValue* lineHeightValue() { return m_lineHeightValue; }
-
     void cacheUserAgentBorderAndBackground()
     {
         // RenderTheme only needs the cached style if it has an appearance,
@@ -152,8 +146,6 @@ private:
     bool m_applyPropertyToRegularStyle;
     bool m_applyPropertyToVisitedLinkStyle;
 
-    RawPtrWillBeMember<CSSValue> m_lineHeightValue;
-
     FontBuilder m_fontBuilder;
 
     OwnPtr<CachedUAStyle> m_cachedUAStyle;
@@ -163,8 +155,6 @@ private:
     // a back-pointer to this object.
     CSSToStyleMap m_styleMap;
     Vector<AtomicString> m_contentAttrValues;
-
-    RawPtrWillBeMember<StyleRule> m_currentRule;
 };
 
 } // namespace blink