Do not eagerly add guarded leaf classes with CHA; do not add them for private names.

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 1103 matching lines @@
     return TypeTest(kIsMoreSpecificThan,
                     type_arguments,
                     other,
                     other_type_arguments,
                     bound_error);
   }
 
   // Check if this is the top level class.
   bool IsTopLevel() const;
 
+  bool IsPrivate() const;
+
   RawArray* fields() const { return raw_ptr()->fields_; }
   void SetFields(const Array& value) const;
   void AddField(const Field& field) const;
   void AddFields(const GrowableObjectArray& fields) const;
   intptr_t FindFieldIndex(const Field& field) const;
   RawField* FieldFromIndex(intptr_t idx) const;
 
   // Returns an array of all fields of this class and its superclasses indexed
   // by offset in words.
   RawArray* OffsetToFieldMap() const;
@@ skipping 6653 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_