bluetooth: Add Device connection logic and accompanying user interface.

chrome/browser/resources/bluetooth_internals/device_collection.js

 // Copyright 2016 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.
 
 /**
  * Javascript for DeviceCollection, served from
  *     chrome://bluetooth-internals/.
  */
 
 cr.define('device_collection', function() {
@@ skipping 58 matching lines @@
   };
 
   /*
    * Data model for a cached device.
    * @constructor
    * @param {!interfaces.BluetoothDevice.DeviceInfo} info
    */
   var Device = function(info) {
     this.info = info;
     this.removed = false;
+    this.connectionPending = false;
+  };
+  Device.prototype = {
+    /**
+     * Creates a connection to the device and updates the service listing.
+     * @return {Promise} rejects if connection failed, resolves otherwise.
+     */
+    connect: function() {
+      this.connectionPending = true;
+      return adapter_broker.getAdapterBroker().then(function(broker) {
+        return broker.connectToDevice(this.info.address);
+      }.bind(this)).then(function(response) {
+        this.connectionPending = false;
+        if (response.error ==

[ortuno, 2016/11/08 04:38:02]

I would move this (if (response.error)... throw new Error(...);) to
AdapterBroker.

[mbrunson, 2016/11/08 22:45:12]

Done.

+            interfaces.BluetoothAdapter.ConnectResult.SUCCESS) {
+          this.proxy = response.device;
+          return this.proxy.getServices();
+        }
+
+        // TODO(mbrunson): Replace with more descriptive error messages.

[ortuno, 2016/11/08 04:38:02]

TODOs are usually used when there are other dependencies that need to be met in
order to fix an edge case or if the solution is too complex for this patch.
Either way, you should always point to an issue explaining the problem and, if
the former, block it on another issue. This way other contributors can
understand the context of the problem and submit a patch to fix it.

[mbrunson, 2016/11/08 22:45:12]

Ok. I'll make an issue. Done.

+        var errorString = Object.keys(
+            interfaces.BluetoothAdapter.ConnectResult)[response.error];
+
+        throw new Error(errorString);
+      }.bind(this)).then(function(response) {
+        this.info.services = response.services;
+      }.bind(this));
+    },
+
+    /**
+     * Disconnects a device and removes the Device interface proxy.
+     */
+    disconnect: function() {
+      if (this.proxy) {
+        this.proxy.disconnect();
+        this.proxy = null;
+      }
+    }
   };
 
   return {
     Device: Device,
     DeviceCollection: DeviceCollection,
   };
 });