Revert "Build Observatory with runtime"

runtime/observatory/test/weak_properties_test.dart

-// Copyright (c) 2014, 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.
-
-library vm_references_test;
-
-import 'dart:async';
-import 'dart:mirrors';
-import 'package:observatory/service_io.dart';
-import 'package:unittest/unittest.dart';
-import 'test_helper.dart';
-
-class Foo { }
-class Bar { }
-
-var expando;
-var key;
-var value;
-var weak_property;
-
-void script() {
-  expando = new Expando('some debug name');
-  key = new Foo();
-  value = new Bar();
-  expando[key] = value;
-
-  InstanceMirror expandoMirror = reflect(expando);
-  LibraryMirror libcore = expandoMirror.type.owner;
-
-  var entries = expandoMirror.getField(MirrorSystem.getSymbol('_data', libcore)).reflectee;
-  weak_property = entries.singleWhere((e) => e != null);
-  print(weak_property);
-}
-
-var tests = [
-
-(Isolate isolate) =>
-  isolate.rootLib.load().then((Library lib) {
-    Field keyField = lib.variables.singleWhere((v) => v.name == 'key');
-    Instance key = keyField.value;
-    Field valueField = lib.variables.singleWhere((v) => v.name == 'value');
-    Instance value = valueField.value;
-    Field propField = lib.variables.singleWhere((v) => v.name == 'weak_property');
-    Instance prop = propField.value;
-
-    expect(key.isWeakProperty, isFalse);
-    expect(value.isWeakProperty, isFalse);
-    expect(prop.isWeakProperty, isTrue);
-    expect(prop.key, isNull);
-    expect(prop.value, isNull);
-    return prop.load().then((Instance loadedProp) {
-      // Object ids are not cannonicalized, so we rely on the key and value
-      // being the sole instances of their classes to test we got the objects
-      // we expect.
-      expect(loadedProp.key, isNotNull);
-      expect(loadedProp.key.clazz, equals(key.clazz));
-      expect(loadedProp.value, isNotNull);
-      expect(loadedProp.value.clazz, equals(value.clazz));
-    });
-  }),
-
-];
-
-main(args) => runIsolateTests(args, tests, testeeBefore: script);