Implement closurization of regular methods in ObjectMirror.getField in the VM.

runtime/vm/object.h

Index: runtime/vm/object.h
diff --git a/runtime/vm/object.h b/runtime/vm/object.h
index 2f9702bba81fe090dc55cb5957b84e0059c99e30..2c18c69863f752bb40f7a4c3ab289fcf8f1b7067 100644
--- a/runtime/vm/object.h
+++ b/runtime/vm/object.h
@@ -1468,9 +1468,6 @@ class Function : public Object {
   RawClass* signature_class() const;
   void set_signature_class(const Class& value) const;
 
-  RawInstance* implicit_static_closure() const;
-  void set_implicit_static_closure(const Instance& closure) const;
-
   RawCode* closure_allocation_stub() const;
   void set_closure_allocation_stub(const Code& value) const;
 
@@ -1502,6 +1499,10 @@ class Function : public Object {
   // If none exists yet, create one and remember it.
   RawFunction* ImplicitClosureFunction() const;
 
+  // Return the closure implicitly created for this function.
+  // If none exists yet, create one and remember it.
+  RawInstance* ImplicitStaticClosure() const;
+
   // Redirection information for a redirecting factory.
   bool IsRedirectingFactory() const;
   RawType* RedirectionType() const;
@@ -1862,6 +1863,8 @@ class Function : public Object {
   void set_owner(const Object& value) const;
   RawFunction* implicit_closure_function() const;
   void set_implicit_closure_function(const Function& value) const;
+  RawInstance* implicit_static_closure() const;
+  void set_implicit_static_closure(const Instance& closure) const;
   void set_num_optional_parameters(intptr_t value) const;  // Encoded value.
   void set_kind_tag(intptr_t value) const;
   void set_data(const Object& value) const;