- Leave abstract class StackTrace be an abstract class and

runtime/vm/symbols.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_SYMBOLS_H_
 #define VM_SYMBOLS_H_
 
 #include "vm/object.h"
 #include "vm/snapshot_ids.h"
 
@@ skipping 157 matching lines @@
   V(_ImmutableList, "_ImmutableList")                                          \
   V(_LinkedHashMap, "_InternalLinkedHashMap")                                  \
   V(_String, "String")                                                         \
   V(OneByteString, "_OneByteString")                                           \
   V(TwoByteString, "_TwoByteString")                                           \
   V(ExternalOneByteString, "_ExternalOneByteString")                           \
   V(ExternalTwoByteString, "_ExternalTwoByteString")                           \
   V(_CapabilityImpl, "_CapabilityImpl")                                        \
   V(_RawReceivePortImpl, "_RawReceivePortImpl")                                \
   V(_SendPortImpl, "_SendPortImpl")                                            \
-  V(StackTrace, "StackTrace")                                                  \
+  V(_StackTrace, "_StackTrace")                                                \
   V(JSSyntaxRegExp, "_JSSyntaxRegExp")                                         \
   V(RegExp, "RegExp")                                                          \
   V(Irregexp, ":irregexp")                                                     \
   V(Object, "Object")                                                          \
   V(Int, "int")                                                                \
   V(Double, "double")                                                          \
   V(_Float32x4, "_Float32x4")                                                  \
   V(_Float64x2, "_Float64x2")                                                  \
   V(_Int32x4, "_Int32x4")                                                      \
   V(Float32x4, "Float32x4")                                                    \
@@ skipping 393 matching lines @@
   friend class SnapshotReader;
   friend class SnapshotWriter;
   friend class ApiMessageReader;
 
   DISALLOW_COPY_AND_ASSIGN(Symbols);
 };
 
 }  // namespace dart
 
 #endif  // VM_SYMBOLS_H_