Wrapping leaf nodes in non polymer elements

runtime/observatory/lib/src/models/exceptions.dart

Index: runtime/observatory/lib/src/models/exceptions.dart
diff --git a/runtime/observatory/lib/src/models/exceptions.dart b/runtime/observatory/lib/src/models/exceptions.dart
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index 0000000000000000000000000000000000000000..871c09554743d0aab74a2e03d38e3dbe4e731eef
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+++ b/runtime/observatory/lib/src/models/exceptions.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 BasicException implements Exception {
+  String get message;
+}
+
+abstract class ConnectionException implements BasicException {}
+
+abstract class ResponseException implements BasicException {}
+
+abstract class RequestException implements BasicException {}
+
+abstract class ParseErrorException implements RequestException {}
+
+abstract class InvalidRequestException implements RequestException {}
+
+abstract class MethodNotFoundException implements RequestException {}
+
+abstract class InvalidParamsException implements RequestException {}
+
+abstract class InternalErrorException implements RequestException {}
+
+abstract class FeatureDisabledException implements RequestException {}
+
+abstract class CannotAddBreakpointException implements RequestException {}
+
+abstract class StreamAlreadySubscribedException implements RequestException {}
+
+abstract class StreamNotSubscribedException implements RequestException {}
+
+abstract class IsolateMustBeRunnableException implements RequestException {}
+
+abstract class IsolateMustBePausedException implements RequestException {}
+
+abstract class IsolateIsReloadingException implements RequestException {}
+
+abstract class FileSystemAlreadyExistsException implements RequestException {}
+
+abstract class FileSystemDoesNotExistException implements RequestException {}
+
+abstract class FileDoesNotExistException implements RequestException {}
+
+abstract class IsolateReloadFailedException implements RequestException {}
+
+abstract class UnknownException implements RequestException {}