Move custom property isInheritedProperty storage logic into ComputedStyle

third_party/WebKit/Source/core/style/StyleInheritedVariables.h

 // Copyright 2015 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 StyleInheritedVariables_h
 #define StyleInheritedVariables_h
 
 #include "core/css/CSSValue.h"
 #include "core/css/CSSVariableData.h"
 #include "wtf/Forward.h"
@@ skipping 19 matching lines @@
   }
 
   void setVariable(const AtomicString& name,
                    PassRefPtr<CSSVariableData> value) {
     m_data.set(name, std::move(value));
   }
   CSSVariableData* getVariable(const AtomicString& name) const;
   void removeVariable(const AtomicString&);
 
   void setRegisteredVariable(const AtomicString&, const CSSValue*);
-  CSSValue* registeredVariable(const AtomicString&) const;
+  const CSSValue* registeredVariable(const AtomicString&) const;
 
   // This map will contain null pointers if variables are invalid due to
   // cycles or referencing invalid variables without using a fallback.
   // Note that this method is slow as a new map is constructed.
   std::unique_ptr<HashMap<AtomicString, RefPtr<CSSVariableData>>> getVariables()
       const;
 
  private:
   StyleInheritedVariables() : m_root(nullptr) {}
   StyleInheritedVariables(StyleInheritedVariables& other);
 
   friend class CSSVariableResolver;
 
   HashMap<AtomicString, RefPtr<CSSVariableData>> m_data;
   HashMap<AtomicString, Persistent<CSSValue>> m_registeredData;
   RefPtr<StyleInheritedVariables> m_root;
 };
 
 }  // namespace blink
 
 #endif  // StyleInheritedVariables_h