Fixes for JUnit tests

compiler/javatests/com/google/dart/compiler/type/TypeAnalyzerTestCase.java

Index: compiler/javatests/com/google/dart/compiler/type/TypeAnalyzerTestCase.java
diff --git a/compiler/javatests/com/google/dart/compiler/type/TypeAnalyzerTestCase.java b/compiler/javatests/com/google/dart/compiler/type/TypeAnalyzerTestCase.java
index d89af675202832e7cc635f70de5294fe3ccdac05..94f98c830da622f33b95417a9d5a1486e41d65ae 100644
--- a/compiler/javatests/com/google/dart/compiler/type/TypeAnalyzerTestCase.java
+++ b/compiler/javatests/com/google/dart/compiler/type/TypeAnalyzerTestCase.java
@@ -45,7 +45,7 @@ import java.util.concurrent.ConcurrentHashMap;
 /**
  * Base class for static type analysis tests.
  */
-public class TypeAnalyzerTestCase extends TypeTestCase {
+public abstract class TypeAnalyzerTestCase extends TypeTestCase {
   private class MockCoreTypeProvider implements CoreTypeProvider {
     private final Type voidType = Types.newVoidType();
     private final DynamicType dynamicType = Types.newDynamicType();
@@ -364,11 +364,4 @@ public class TypeAnalyzerTestCase extends TypeTestCase {
   private Type typeOf(String expression) {
     return analyzeNode(parseExpression(expression));
   }
-
-  /**
-   * This is dummy test method, I have to add it because in other case JUnit (at least in Eclipse)
-   * complains that this test suite has to test methods.
-   */
-  public void testDummy() throws Exception {
-  }
 }