Build Observatory as part of runtime

runtime/bin/vmservice/observatory/lib/src/elements/eval_box.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 eval_box_element;
-
-import 'dart:async';
-import 'dart:html';
-import 'observatory_element.dart';
-import 'package:polymer/polymer.dart';
-
-
-typedef Future evalType(String text);
-
-
-@CustomTag('eval-box')
-class EvalBoxElement extends ObservatoryElement {
-  @observable String text;
-  @observable String lineMode = "1-line";
-
-  @published evalType callback;
-  @observable ObservableList results = toObservable([]);
-
-  void updateLineMode(Event e, var detail, Node target) {
-    lineMode = (e.target as InputElement).value;
-    if (lineMode == '1-line') {
-      text = text.replaceAll('\n', ' ');
-    }
-  }
-
-  void eval(Event e, var detail, Node target) {
-    // Prevent any form action.
-    e.preventDefault();
-
-    // Clear the text box.
-    var expr = text;
-    text = '';
-
-    // Use provided callback to eval the expression.
-    if (callback != null) {
-      var map = toObservable({});
-      map['expr'] = expr;
-      results.insert(0, map);
-      callback(expr).then((result) {
-          map['value'] = result;
-      });
-    }
-  }
-
-  void selectExpr(MouseEvent e) {
-    assert(e.target is Element);
-    Element targetElement = e.target;
-    text = targetElement.getAttribute('expr');
-  }
-
-  EvalBoxElement.created() : super.created();
-}