Add Bluetooth settings dialog tests

chrome/browser/resources/settings/bluetooth_page/bluetooth_pair_device_dialog.js

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview
  * 'settings-bluetooth-pair-device-dialog' is the settings dialog for pairing
  * a bluetooth device.
  *
  * @group Chrome Settings Elements
@@ skipping 154 matching lines @@
   },
 
   /** @private */
   onRejectTap_: function() {
     this.sendResponse_(chrome.bluetoothPrivate.PairingResponse.REJECT);
   },
 
   /** @private */
   onCancelTap_: function() {
     this.sendResponse_(chrome.bluetoothPrivate.PairingResponse.CANCEL);
+    // Close the dialog immediately.
+    this.fire('close-dialog', '');
   },
 
   /** @private */
   onDismissTap_: function() { this.fire('close-dialog', ''); },
 
   /** @private */
   sendResponse_: function(response) {
     if (!this.pairingDevice)
       return;
     var options =
@@ skipping 75 matching lines @@
       var lastKey = this.digits.length;  // 6
       if ((index == -1 && enteredKey > lastKey) || (index + 1 == enteredKey))
         cssClass += ' next';
       else if (index > enteredKey)
         cssClass += ' untyped';
     }
     return cssClass;
   },
 });
 })();