Implement tear-off closure operator #

runtime/vm/object.h

Index: runtime/vm/object.h
diff --git a/runtime/vm/object.h b/runtime/vm/object.h
index b259aace91f16999c855816517e56f68c8c5f363..bae2bbcd9912bd91ac27cdccf9751c2d001543f1 100644
--- a/runtime/vm/object.h
+++ b/runtime/vm/object.h
@@ -2944,6 +2944,12 @@ class Field : public Object {
 
   void EvaluateInitializer() const;
 
+  // For static fields only. Constructs a closure that gets/sets the
+  // field value.
+  RawInstance* GetterClosure() const;
+  RawInstance* SetterClosure() const;
+  RawInstance* AccessorClosure(bool make_setter) const;
+
   // Constructs getter and setter names for fields and vice versa.
   static RawString* GetterName(const String& field_name);
   static RawString* GetterSymbol(const String& field_name);