MD Settings: Eliminate use of ES6 for Chrome OS

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 35054c2c1ce4ede61e2d090f91b7aac4b6588d5f..2f5649126cc4423f2b5a0bbc82c31642f23545b5 100644
--- a/chrome/browser/resources/settings/bluetooth_page/bluetooth_page.js
+++ b/chrome/browser/resources/settings/bluetooth_page/bluetooth_page.js
@@ -228,8 +228,8 @@ Polymer({
 
   /** @private */
   deviceListChanged_: function() {
-    for (let device of this.deviceList_) {
-      if (device.connected) {
+    for (var d = 0; d <this.deviceList_.length; ++d) {

[dpapad, 2017/01/23 19:12:53]

Space missing before |this.deviceList_.length|. Also it is more common to use
'i' for a counter variable.

[stevenjb, 2017/01/24 02:02:03]

done / ack. I tend to prefer more context relevent counter names, but if that's
confusing I'll change it.

+      if (this.deviceList_[d].connected) {
         this.deviceConnected_ = true;
         return;
       }