Updating the samples page to reflect the examples that have been retired.

src/site/samples/gauge/example/gauge.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:html';
-import 'dart:async';
-import 'dart:js';
-
-class Gauge {
-  var jsOptions;
-  var jsTable;
-  var jsChart;
-  
-  // Access to the value of the gauge.
-  num _value;
-  get value => _value;
-  set value(num x) {
-    _value = x;
-    draw();
-  }
-  
-  Gauge(Element element, String title, this._value, Map options) {
-    final data = [['Label', 'Value'], [title, value]];
-    final vis = context["google"]["visualization"];
-    jsTable = vis.callMethod('arrayToDataTable', [new JsObject.jsify(data)]);
-    jsChart = new JsObject(vis["Gauge"], [element]);
-    jsOptions = new JsObject.jsify(options);
-    draw();
-  }
-
-  void draw() {
-    jsTable.callMethod('setValue', [0, 1, value]);
-    jsChart.callMethod('draw', [jsTable, jsOptions]);
-  }
-  
-  static Future load() {
-    Completer c = new Completer();
-    context["google"].callMethod('load',
-       ['visualization', '1', new JsObject.jsify({
-         'packages': ['gauge'],
-         'callback': new JsFunction.withThis(c.complete)
-       })]);
-    return c.future;
-  }
-}
-
-// Bindings to html elements.
-final DivElement visualization = querySelector('#gauge');
-final InputElement slider = querySelector("#slider");
-
-void main() {
-  // Setup the gauge.
-  Gauge.load().then((_) {
-    int sliderValue() => int.parse(slider.value);
-    // Create a Guage after the library has been loaded.
-    Gauge gauge = new Gauge(visualization, "Slider", sliderValue(),
-                      { 'min': 0, 'max': 280,
-                        'yellowFrom': 200, 'yellowTo': 250,
-                        'redFrom': 250, 'redTo': 280,
-                        'minorTicks': 5});
-    // Connect slider value to gauge.
-    slider.onChange.listen((_) => gauge.value = sliderValue());
-  });
-}