MD Settings: polish top-level bluetooth page

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

Index: chrome/browser/resources/settings/bluetooth_page/bluetooth_page.js
diff --git a/chrome/browser/resources/settings/bluetooth_page/bluetooth_page.js b/chrome/browser/resources/settings/bluetooth_page/bluetooth_page.js
index 41ba307bde90b37e189e6bc0065722102514e0f7..e840d0085406700c3f0fd3c5930ef0a8bb9e7651 100644
--- a/chrome/browser/resources/settings/bluetooth_page/bluetooth_page.js
+++ b/chrome/browser/resources/settings/bluetooth_page/bluetooth_page.js
@@ -197,6 +197,14 @@ Polymer({
   },
 
   /**
+   * @return {boolean} Whether the <iron-collapse> can be shown.
+   * @private
+   */
+  canShowDeviceList_: function() {

[stevenjb, 2016/04/12 15:58:49]

We never resolved this in the style guide, but we should at least be consistent
within a file. The rest of this file declares and uses the passed in properties.

FWIW at first look I thought this might be a bug since it appears that the
properties were not being passed to this.

Also, I just fixed a Polymer bug where only one out of 4 dependent properties
was being passed to a function. It was easy to spot the bug since the function
was using this.bar but not passing bar to the function.

[Dan Beam, 2016/04/12 19:51:02]

Done.

+    return this.bluetoothEnabled && this.deviceListExpanded;
+  },
+
+  /**
    * If bluetooth is enabled, request the complete list of devices and update
    * |deviceList|.
    * @private