Mark all private functions in dart: libraries as invisible (*sniff*).

runtime/vm/object.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 2151 matching lines @@
 
   RawArray* ic_data_array() const;
   void ClearICData() const;
 
   static const int kCtorPhaseInit = 1 << 0;
   static const int kCtorPhaseBody = 1 << 1;
   static const int kCtorPhaseAll = (kCtorPhaseInit | kCtorPhaseBody);
 
   void set_modifier(RawFunction::AsyncModifier value) const;
 
+  // An invisible function is hidden from stack traces, will not be enumerated
+  // by mirrors, and cannot be directly invoked by mirrors. All private
+  // functions in dart:* libraries are marked invisible by the parser.
+
 #define FOR_EACH_FUNCTION_KIND_BIT(V)                                          \
   V(Static, is_static)                                                         \
   V(Const, is_const)                                                           \
   V(Abstract, is_abstract)                                                     \
   V(Visible, is_visible)                                                       \
   V(Debuggable, is_debuggable)                                                 \
   V(Optimizable, is_optimizable)                                               \
   V(Inlinable, is_inlinable)                                                   \
   V(Intrinsic, is_intrinsic)                                                   \
   V(Native, is_native)                                                         \
@@ skipping 5518 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_