Class reserved word not honored

[jtmcdole]

Adding a new test and noticed Frog failed:

// Copyright (c) 2011, 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.

// Test that "class" cannot be used as identifier.

class foo {}
void main() {
  int class = 10; /// 01: compile-time error
  print("$class"); /// 02: compile-time error
}

[dgrove]

Set owner to @dgrove.
Added Started label.

[dgrove]

fixed in r2595

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Added Fixed label.