bluetooth: Basic browser tests for chrome://bluetooth-internals.

chrome/browser/resources/bluetooth_internals/bluetooth_internals.js

Index: chrome/browser/resources/bluetooth_internals/bluetooth_internals.js
diff --git a/chrome/browser/resources/bluetooth_internals/bluetooth_internals.js b/chrome/browser/resources/bluetooth_internals/bluetooth_internals.js
index 5059c3ece81068daacbf4feaf00a18ca5a0af98a..2826f2e4ad0ae6a37db2da5922cda04d730efbc4 100644
--- a/chrome/browser/resources/bluetooth_internals/bluetooth_internals.js
+++ b/chrome/browser/resources/bluetooth_internals/bluetooth_internals.js
@@ -7,13 +7,16 @@
  *     chrome://bluetooth-internals/.
  */
 
+// Expose for testing.
+var adapterBroker = null;
+var devices = null;
+
 cr.define('bluetooth_internals', function() {
 
   /** @type {!Map<string, !interfaces.BluetoothDevice.Device.proxyClass>} */
   var deviceAddressToProxy = new Map();
 
   function initializeViews() {
-    var adapterBroker = null;
     adapter_broker.getAdapterBroker()
       .then(function(broker) { adapterBroker = broker; })
       .then(function() { return adapterBroker.getInfo(); })
@@ -21,7 +24,7 @@ cr.define('bluetooth_internals', function() {
       .then(function() { return adapterBroker.getDevices(); })
       .then(function(response) {
         // Hook up device collection events.
-        var devices = new device_collection.DeviceCollection([]);
+        devices = new device_collection.DeviceCollection([]);
         adapterBroker.addEventListener('deviceadded', function(event) {
           devices.addOrUpdate(event.detail.deviceInfo);
         });
@@ -80,6 +83,8 @@ cr.define('bluetooth_internals', function() {
         });
 
         deviceTable.setDevices(devices);
+        deviceTable.id = 'device-table';
+
         document.body.appendChild(deviceTable);
       })
       .catch(function(error) { console.error(error); });
@@ -88,7 +93,6 @@ cr.define('bluetooth_internals', function() {
   return {
     initializeViews: initializeViews
   };
-
 });
 
 document.addEventListener(