Revert "Introduce StackTraceOnThrowMixin."

runtime/tests/vm/dart/isolate_mirror_local_test.dart

 // 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.
 //
 // Dart test program for checking implemention of MirrorSystem when
 // inspecting the current isolate.
 //
 // VMOptions=--enable_type_checks
 
 library isolate_mirror_local_test;
@@ skipping 309 matching lines @@
   // TODO(ahe): toString() test disabled for now as Symbols are 100% opaque.
   // Expect.equals("ClassMirror on 'List'", list_intf.toString());
 
   // Lookup a class from a library and make sure it is sane.
   ClassMirror oom_cls = core_lib.members[const Symbol('OutOfMemoryError')];
   Expect.isTrue(oom_cls is ClassMirror);
   Expect.equals(const Symbol('OutOfMemoryError'), oom_cls.simpleName);
   Expect.equals(const Symbol('dart.core.OutOfMemoryError'),
                 oom_cls.qualifiedName);
   Expect.isFalse(oom_cls.isPrivate);
-  Expect.equals(const Symbol('Error'), oom_cls.superclass.simpleName);
+  Expect.equals(const Symbol('Object'), oom_cls.superclass.simpleName);
   Expect.isTrue(oom_cls.defaultFactory == null);
   Expect.equals(const Symbol('dart.core'), oom_cls.owner.simpleName);
   Expect.isTrue(oom_cls.isClass);
-  Expect.isTrue(oom_cls.superinterfaces.isEmpty);
+  Expect.equals(const Symbol('Error'), oom_cls.superinterfaces[0].simpleName);
   // TODO(ahe): toString() test disabled for now as Symbols are 100% opaque.
   // Expect.equals("ClassMirror on 'OutOfMemoryError'",
   //               oom_cls.toString());
   testDone('testLibrariesMap');
 }
 
 void testMirrorSystem(MirrorSystem mirrors) {
   Expect.isTrue(mirrors.isolate.debugName.contains('main'));
   testRootLibraryMirror(mirrors.isolate.rootLibrary);
   testLibrariesMap(mirrors.libraries);
@@ skipping 194 matching lines @@
   // Test that an isolate can reflect on itself.
   mirrorSystemOf(exit_port.toSendPort()).then(testMirrorSystem);
 
   testIntegerInstanceMirror(reflect(1001));
   testStringInstanceMirror(reflect('This\nis\na\nString'));
   testBoolInstanceMirror(reflect(true));
   testNullInstanceMirror(reflect(null));
   testCustomInstanceMirror(reflect(new MyClass(17)));
   testMirrorErrors(currentMirrorSystem());
 }