Fixes for JUnit tests

compiler/javatests/com/google/dart/corelib/SharedTestCase.java

 // 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.
 
 package com.google.dart.corelib;
 
 import com.google.dart.compiler.CommandLineOptions.CompilerOptions;
 import com.google.dart.compiler.ast.DartUnit;
 import com.google.dart.compiler.CompilerConfiguration;
 import com.google.dart.compiler.DartArtifactProvider;
@@ skipping 39 matching lines @@
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.regex.Pattern;
 
 /**
  * Wrapper around test that are shared between compiler and runtime (test.py).
  * <p>
  * Sometimes, when fixing a known issue, a test that was previously crashing or failing may start
  * passing. This will show up as a test failure because the status file has wrong information.
  * Please update the status file.
  */
-public class SharedTestCase extends TestCase {
+public abstract class SharedTestCase extends TestCase {
   private static final Pattern SEPARATOR = Pattern.compile("\\t");
 
   private final Set<String> outcomes;
   private final boolean isNegative;
   private final String[] arguments;
   private final boolean regularCompile;
   private final AtomicInteger compilationErrorCount = new AtomicInteger(0);
   private final AtomicInteger typeErrorCount = new AtomicInteger(0);
   private final AtomicInteger warningCount = new AtomicInteger(0);
 
@@ skipping 212 matching lines @@
   }
 
   static Test getInstance(String line, boolean regularCompile) {
     String[] fields = SEPARATOR.split(line);
     assertTrue(line, fields.length > 3);
     String name = fields[0];
     Set<String> outcomes = new HashSet<String>(Arrays.<String>asList(fields[1].split(",")));
     boolean isNegative = fields[2].equals("True");
     String[] arguments = new String[fields.length - 3];
     System.arraycopy(fields, 3, arguments, 0, arguments.length);
-    return new SharedTestCase(name, outcomes, isNegative, regularCompile, arguments);
+    return new SharedTestCase(name, outcomes, isNegative, regularCompile, arguments) {};
   }
 }