Removed Polymer from Observatory deps

packages/polymer/test/attr_mustache_test.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.
-
-import 'dart:async';
-import 'dart:html';
-import 'package:polymer/polymer.dart';
-import 'package:unittest/unittest.dart';
-import 'package:unittest/html_config.dart';
-import 'package:template_binding/template_binding.dart';
-
-@CustomTag('x-target')
-class XTarget extends PolymerElement {
-  XTarget.created() : super.created();
-
-  final Completer _found = new Completer();
-  Future get foundSrc => _found.future;
-
-  // force an mdv binding
-  bind(name, value, {oneTime: false}) =>
-      nodeBindFallback(this).bind(name, value, oneTime: oneTime);
-
-  attached() {
-    testSrcForMustache();
-  }
-
-  attributeChanged(name, oldValue, newValue) {
-    testSrcForMustache();
-    if (attributes[name] == '../testSource') {
-      _found.complete();
-    }
-  }
-
-  testSrcForMustache() {
-    expect(attributes['src'], isNot(matches(Polymer.bindPattern)),
-        reason: 'attribute does not contain {{...}}');
-  }
-}
-
-@CustomTag('x-test')
-class XTest extends PolymerElement {
-  XTest.created() : super.created();
-
-  @observable var src = 'testSource';
-}
-
-main() => initPolymer().then((zone) => zone.run(() {
-  useHtmlConfiguration();
-
-  setUp(() => Polymer.onReady);
-
-  test('mustache attributes', () {
-    final xtest = document.querySelector('#test');
-    final xtarget = xtest.shadowRoot.querySelector('#target');
-    return xtarget.foundSrc;
-  });
-}));