Allow implicit 'close your eyes' of native methods. This will hopefully fix issue 3466.

vm/object.cc

Index: vm/object.cc
===================================================================
--- vm/object.cc	(revision 8752)
+++ vm/object.cc	(working copy)
@@ -3609,6 +3609,11 @@
 }
 
 
+void Function::set_is_native(bool value) const {
+  raw_ptr()->is_native_ = value;
+}
+
+
 intptr_t Function::NumberOfParameters() const {
   return num_fixed_parameters() + num_optional_parameters();
 }
@@ -3867,6 +3872,7 @@
   result.set_usage_counter(0);
   result.set_deoptimization_counter(0);
   result.set_is_optimizable(true);
+  result.set_is_native(false);
   return result.raw();
 }