[CSSTypedOM] Computed StylePropertyMap use ComputedStyle for Lengths

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/ComputedStyleCSSValueMapping.h"
 #include "core/css/cssom/ImmutableStylePropertyMap.h"
+#include "core/dom/Node.h"
+#include "core/layout/LayoutObject.h"
 
 namespace blink {
 
 class CORE_EXPORT ComputedStylePropertyMap : public ImmutableStylePropertyMap {
     WTF_MAKE_NONCOPYABLE(ComputedStylePropertyMap);
 
 public:
-    static ComputedStylePropertyMap* create(CSSComputedStyleDeclaration* computedStyleDeclaration)
+    static ComputedStylePropertyMap* create(CSSComputedStyleDeclaration* computedStyleDeclaration, Node* node)
     {
-        return new ComputedStylePropertyMap(computedStyleDeclaration);
+        return new ComputedStylePropertyMap(computedStyleDeclaration, node);
     }
 
     Vector<String> getProperties() override;
 
     DEFINE_INLINE_VIRTUAL_TRACE()
     {
         visitor->trace(m_computedStyleDeclaration);
+        visitor->trace(m_node);
         ImmutableStylePropertyMap::trace(visitor);
     }
 
 protected:
-    ComputedStylePropertyMap(CSSComputedStyleDeclaration* computedStyleDeclaration)
+    ComputedStylePropertyMap(CSSComputedStyleDeclaration* computedStyleDeclaration, Node* node)
         : ImmutableStylePropertyMap()
-        , m_computedStyleDeclaration(computedStyleDeclaration) { }
+        , m_computedStyleDeclaration(computedStyleDeclaration)
+        , m_node(node) { }
 
     CSSStyleValueVector getAllInternal(CSSPropertyID) override;
     CSSStyleValueVector getAllInternal(AtomicString customPropertyName) override;
 
     HeapVector<StylePropertyMapEntry> getIterationEntries() override { return HeapVector<StylePropertyMapEntry>(); }
 
     Member<CSSStyleDeclaration> m_computedStyleDeclaration;
+    Member<Node> m_node;

[meade_UTC10, 2016/09/09 01:56:27]

Do we really need both the node and the computed StyleDeclaration?

 };
 
 } // namespace blink
 
 #endif