Add an update warning for downloading over mobile data

chrome/browser/resources/settings/about_page/update_warning_dialog.js

Index: chrome/browser/resources/settings/about_page/update_warning_dialog.js
diff --git a/chrome/browser/resources/settings/about_page/update_warning_dialog.js b/chrome/browser/resources/settings/about_page/update_warning_dialog.js
new file mode 100644
index 0000000000000000000000000000000000000000..775abee874a0cfc9ac5c60b33201399873d83269
--- /dev/null
+++ b/chrome/browser/resources/settings/about_page/update_warning_dialog.js
@@ -0,0 +1,48 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.

[michaelpg, 2017/04/04 00:44:52]

2017 :-)

[weidongg, 2017/04/04 04:25:11]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @fileoverview 'settings-update-warning-dialog' is a component warning the
+ * user about update over mobile data. By clicking 'Continue', the user
+ * agrees to download update using mobile data.
+ */
+Polymer({
+  is: 'settings-update-warning-dialog',
+
+  behaviors: [I18nBehavior],
+
+  properties: {

[michaelpg, 2017/04/04 00:44:52]

omit empty properties object

[weidongg, 2017/04/04 04:25:12]

Done.

+  },
+
+  /** @override */
+  ready: function() {
+    this.browserProxy_ = settings.AboutPageBrowserProxyImpl.getInstance();
+  },
+
+  /** @override */
+  attached: function() {
+    this.$.dialog.showModal();
+  },
+
+  /** @private */
+  onCancelTap_: function() {
+    //TODO(weidongg): implement the real behaviors here.

[michaelpg, 2017/04/04 00:44:52]

nit here and below: "// TODO(..." (space after //)

[weidongg, 2017/04/04 04:25:11]

Done.

+    this.$.dialog.close();
+  },
+
+  /** @private */
+  onContinueTap_: function() {
+    //TODO(weidongg): implement the real behaviors here.
+    this.$.dialog.close();
+  },
+
+  /**
+   * @param {string} updateSizeMb size of the update in megabytes.

[michaelpg, 2017/04/04 00:44:52]

nit: capitalize Size

[weidongg, 2017/04/04 04:25:11]

Done.

+   * @private
+   */
+  setUpdateWarningMessage: function(updateSizeMb) {
+     this.$$("#update-warning-message").innerHTML =
+          this.i18n("aboutUpdateWarningMessage", updateSizeMb);

[michaelpg, 2017/04/04 00:44:52]

4-space indent (looks like 5)

[weidongg, 2017/04/04 04:25:11]

Done.

+  },
+});