Removed polymer & mirror from Observatory

runtime/observatory/lib/src/elements/shims/binding.dart

-// Copyright (c) 2016, 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:core';
-import 'dart:html';
-import 'dart:js';
-@MirrorsUsed(metaTargets: const [BindableAnnotation])
-import 'dart:mirrors';
-import 'package:js/js.dart';
-import 'package:js_util/js_util.dart';
-import 'package:polymer/polymer.dart';
-
-const BindableAnnotation bindable = const BindableAnnotation();
-class BindableAnnotation {
-  const BindableAnnotation();
-}
-
-
-///This is a temporary bridge between Polymer Bindings and the wrapper entities.
-class Binder<T extends HtmlElement> {
-  final Map<String, Symbol> attributes;
-
-  const Binder(Map<String, Symbol> attributes)
-      : attributes = attributes;
-
-  registerCallback(T element) {
-    assert(element != null);
-    setValue(element, 'bind', allowInteropCaptureThis(_callback));
-  }
-
-  void _callback(_this, name, value, [other]) {
-    final setter = attributes[name];
-    if (setter == null) return;
-    Bindable bindable;
-    if (identical(1, 1.0)) { // dart2js
-      bindable = getValue(getValue(value, '__dartBindable'), 'o') as Bindable;
-    } else { // vm
-      bindable = getValue(value, '__dartBindable');
-    }
-    var obj = reflect(_this);
-    obj.setField(setter, bindable.value);
-    bindable.open((value) {
-      obj.setField(setter, value);
-    });
-  }
-}