Fix in analyzer for consecutively labeled case statments.

compiler/javatests/com/google/dart/compiler/parser/SyntaxTest.java

 // 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.
 
 package com.google.dart.compiler.parser;
 
 import com.google.common.base.Joiner;
 import com.google.dart.compiler.DartCompilerListener;
 import com.google.dart.compiler.DartSourceTest;
 import com.google.dart.compiler.ast.DartArrayLiteral;
@@ skipping 615 matching lines @@
   public void testBogusEscapedNewline() throws Exception {
     parseUnit("phony_bogus_escaped_newline.dart",
         Joiner.on("\n").join(
             "class A {",
             "  var foo = \"not really multiline\\\n",
             "\";",
             "}"),
             ParserErrorCode.UNEXPECTED_TOKEN,  2, 13,
             ParserErrorCode.EXPECTED_TOKEN,  4, 1);
   }
+
+  public void testLabelledCaseStatements() throws Exception {
+    parseUnit("phony_labelled_case_statements.dart",
+        Joiner.on("\n").join(
+            "method() {",
+            "  switch(1) {",
+            "  A: case 0:",
+            "  B: case 1:",
+            "    break;",
+            "  }",
+            "}"));
+  }
 }