remove memoryinstrumentation

Source/core/dom/ElementShadow.cpp

Index: Source/core/dom/ElementShadow.cpp
diff --git a/Source/core/dom/ElementShadow.cpp b/Source/core/dom/ElementShadow.cpp
index 4388b0b18b31b81cdaccb3951a9b5fff613f4cb2..6b12bdad5e7846e607fb2df36a6208ae71ef3bb6 100644
--- a/Source/core/dom/ElementShadow.cpp
+++ b/Source/core/dom/ElementShadow.cpp
@@ -131,16 +131,4 @@ void ElementShadow::removeAllEventListeners()
     }
 }
 
-void ElementShadow::reportMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
-{
-    MemoryClassInfo info(memoryObjectInfo, this, WebCoreMemoryTypes::DOM);
-    info.addMember(m_shadowRoots, "shadowRoots");
-    ShadowRoot* shadowRoot = m_shadowRoots.head();
-    while (shadowRoot) {
-        info.addMember(shadowRoot, "shadowRoot");
-        shadowRoot = shadowRoot->next();
-    }
-    info.addMember(m_distributor, "distributor");
-}
-
 } // namespace