Add ClassDeclaration/ClassTypeAlias.isAbstract() and use them.

editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/ast/ClassTypeAliasTest.java

Index: editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/ast/ClassTypeAliasTest.java
diff --git a/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/element/angular/TestAll.java b/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/ast/ClassTypeAliasTest.java
similarity index 55%
copy from editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/element/angular/TestAll.java
copy to editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/ast/ClassTypeAliasTest.java
index 2f8282ba0bd04916725e65be689353c9714cb585..ad8555d2509ab7126d4c25e3fdd5d258e73c2cfd 100644
--- a/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/element/angular/TestAll.java
+++ b/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/ast/ClassTypeAliasTest.java
@@ -11,17 +11,16 @@
  * or implied. See the License for the specific language governing permissions and limitations under
  * the License.
  */
-package com.google.dart.engine.element.angular;
+package com.google.dart.engine.ast;
 
-import com.google.dart.engine.ExtendedTestSuite;
+import com.google.dart.engine.parser.ParserTestCase;
+import com.google.dart.engine.scanner.Keyword;
 
-import junit.framework.Test;
-import junit.framework.TestSuite;
+import static com.google.dart.engine.ast.AstFactory.classTypeAlias;
 
-public class TestAll {
-  public static Test suite() {
-    TestSuite suite = new ExtendedTestSuite("Tests in " + TestAll.class.getPackage().getName());
-    suite.addTestSuite(AngularPropertyKindTest.class);
-    return suite;
+public class ClassTypeAliasTest extends ParserTestCase {
+  public void test_isAbstract() throws Exception {
+    assertFalse(classTypeAlias("A", null, null, null, null, null).isAbstract());
+    assertTrue(classTypeAlias("B", null, Keyword.ABSTRACT, null, null, null).isAbstract());
   }
 }