Implement ComputedStylePropertyMap for Typed OM.

third_party/WebKit/Source/core/css/cssom/ComputedStylePropertyMap.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 ComputedStylePropertyMap_h
+#define ComputedStylePropertyMap_h
+
+#include "core/css/CSSComputedStyleDeclaration.h"
+#include "core/css/cssom/ImmutableStylePropertyMap.h"
+
+namespace blink {
+
+class CORE_EXPORT ComputedStylePropertyMap : public ImmutableStylePropertyMap {
+    WTF_MAKE_NONCOPYABLE(ComputedStylePropertyMap);
+
+public:
+    static ComputedStylePropertyMap* create(CSSComputedStyleDeclaration* computedStyleDeclaration)
+    {
+        return new ComputedStylePropertyMap(computedStyleDeclaration);
+    }
+
+    StyleValueVector getAll(CSSPropertyID) override;
+    bool has(CSSPropertyID) override;
+    Vector<String> getProperties() override;
+
+    DEFINE_INLINE_VIRTUAL_TRACE()
+    {
+        visitor->trace(m_computedStyleDeclaration);
+        ImmutableStylePropertyMap::trace(visitor);
+    }
+
+protected:
+    ComputedStylePropertyMap(CSSComputedStyleDeclaration* computedStyleDeclaration)
+        : ImmutableStylePropertyMap()
+        , m_computedStyleDeclaration(computedStyleDeclaration) { }
+
+    IterationSource* startIteration(ScriptState*, ExceptionState&) override { return nullptr; }
+
+    Member<CSSStyleDeclaration> m_computedStyleDeclaration;
+};
+
+} // namespace blink
+
+#endif