Implement ComputedStylePropertyMap for Typed OM.

third_party/WebKit/Source/core/css/cssom/InlineStylePropertyMap.h

 // Copyright 2016 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 InlineStylePropertyMap_h
 #define InlineStylePropertyMap_h
 
 #include "core/css/cssom/MutableStylePropertyMap.h"
 #include "core/dom/Element.h"
 
 namespace blink {
 
 class CORE_EXPORT InlineStylePropertyMap final : public MutableStylePropertyMap {
     WTF_MAKE_NONCOPYABLE(InlineStylePropertyMap);
 public:
     explicit InlineStylePropertyMap(Element* ownerElement)
         : m_ownerElement(ownerElement) { }
 
     StyleValueVector getAll(CSSPropertyID) override;
-    bool has(CSSPropertyID) override;
     Vector<String> getProperties() override;
 
     void set(CSSPropertyID, StyleValueOrStyleValueSequenceOrString&, ExceptionState&) override;
     void append(CSSPropertyID, StyleValueOrStyleValueSequenceOrString&, ExceptionState&) override;
     void remove(CSSPropertyID, ExceptionState&) override;
 
     DEFINE_INLINE_VIRTUAL_TRACE()
     {
         visitor->trace(m_ownerElement);
         MutableStylePropertyMap::trace(visitor);
     }
 
 private:
     Member<Element> m_ownerElement;
 };
 
 } // namespace blink
 
 #endif