Wrapping leaf nodes in non polymer elements

runtime/observatory/lib/src/models/objects/source_location.dart

Index: runtime/observatory/lib/src/models/objects/source_location.dart
diff --git a/runtime/observatory/lib/src/models/objects/source_location.dart b/runtime/observatory/lib/src/models/objects/source_location.dart
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+// Copyright (c) 2016, 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
+
+part of models;
+
+abstract class SourceLocation {
+  /// The script containing the source location.
+  ScriptRef get script;
+  /// The first token of the location.
+  int get tokenPos;
+  /// The last token of the location if this is a range.
+  int get endTokenPos;
+}