Revert "Build Observatory with runtime"

runtime/observatory/lib/src/elements/class_view.dart

-// Copyright (c) 2013, 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 class_view_element;
-
-import 'dart:async';
-import 'observatory_element.dart';
-import 'package:observatory/service.dart';
-import 'package:polymer/polymer.dart';
-
-@CustomTag('class-view')
-class ClassViewElement extends ObservatoryElement {
-  @published Class cls;
-  @observable ServiceMap instances;
-  @observable int retainedBytes;
-  ClassViewElement.created() : super.created();
-
-  Future<ServiceObject> eval(String text) {
-    return cls.get("eval?expr=${Uri.encodeComponent(text)}");
-  }
-
-  Future<ServiceObject> reachable(var limit) {
-    return cls.get("instances?limit=$limit")
-        .then((ServiceMap obj) {
-          instances = obj;
-        });
-  }
-
-  // TODO(koda): Add no-arg "calculate-link" instead of reusing "eval-link".
-  Future<ServiceObject> retainedSize(var dummy) {
-    return cls.get("retained").then((Instance obj) {
-      retainedBytes = int.parse(obj.valueAsString);
-    });
-  }
-
-  void refresh(var done) {
-    instances = null;
-    retainedBytes = null;
-    cls.reload().whenComplete(done);
-  }
-
-  void refreshCoverage(var done) {
-    cls.refreshCoverage().whenComplete(done);
-  }
-}