VM: Evaluate-in-frame should happen in the scope of the method class, not the receiver class.

runtime/vm/object.h

Index: runtime/vm/object.h
diff --git a/runtime/vm/object.h b/runtime/vm/object.h
index 5f2692a08fd984cd28c61a39401bdf7412ae022a..91d8e0e46e58301bba742c04fee3be487ea5a5ce 100644
--- a/runtime/vm/object.h
+++ b/runtime/vm/object.h
@@ -5190,7 +5190,8 @@ class Instance : public Object {
   // error object if evaluating the expression fails. The method has
   // the formal parameters given in param_names, and is invoked with
   // the argument values given in param_values.
-  RawObject* Evaluate(const String& expr,
+  RawObject* Evaluate(const Class& method_cls,
+                      const String& expr,
                       const Array& param_names,
                       const Array& param_values) const;