Mark private functions in dart:* that are native or constructors is not visible (omitted from stack…

runtime/lib/mirrors.cc

Index: runtime/lib/mirrors.cc
diff --git a/runtime/lib/mirrors.cc b/runtime/lib/mirrors.cc
index 894b3edc89855dfa7f95e6d6355a0f720a33e28a..7c6aecfa2ff21694bd5ef8e2feaec690cd09202f 100644
--- a/runtime/lib/mirrors.cc
+++ b/runtime/lib/mirrors.cc
@@ -1296,7 +1296,7 @@ DEFINE_NATIVE_ENTRY(ClassMirror_constructors, 2) {
   Function& func = Function::Handle();
   for (intptr_t i = 0; i < num_functions; i++) {
     func ^= functions.At(i);
-    if (func.kind() == RawFunction::kConstructor) {
+    if (func.is_visible() && func.kind() == RawFunction::kConstructor) {
       constructor_mirror = CreateMethodMirror(func, owner_mirror);
       constructor_mirrors.Add(constructor_mirror);
     }