remove memoryinstrumentation

Source/core/css/CSSVariableValue.h

Index: Source/core/css/CSSVariableValue.h
diff --git a/Source/core/css/CSSVariableValue.h b/Source/core/css/CSSVariableValue.h
index 4daa290ccc248bc4b112b22907df6cf466541dba..b51d5a08519e4be91046cd34516cec9acb8bf4dd 100644
--- a/Source/core/css/CSSVariableValue.h
+++ b/Source/core/css/CSSVariableValue.h
@@ -32,7 +32,6 @@
 #include "CSSParserValues.h"
 #include "CSSPropertyNames.h"
 #include "CSSValue.h"
-#include "WebCoreMemoryInstrumentation.h"
 
 namespace WebCore {
 
@@ -48,13 +47,6 @@ public:
 
     bool equals(const CSSVariableValue& other) const { return m_name == other.m_name && m_value == other.m_value; }
 
-    void reportDescendantMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
-    {
-        MemoryClassInfo info(memoryObjectInfo, this, WebCoreMemoryTypes::CSS);
-        info.addMember(m_name, "name");
-        info.addMember(m_value, "value");
-    }
-
 private:
     CSSVariableValue(const AtomicString& name, const String& value)
         : CSSValue(VariableClass)