MD Settings: Convert all usages of .bind(this) to use ES6 arrow function.

chrome/browser/resources/settings/internet_page/internet_subpage.js

Index: chrome/browser/resources/settings/internet_page/internet_subpage.js
diff --git a/chrome/browser/resources/settings/internet_page/internet_subpage.js b/chrome/browser/resources/settings/internet_page/internet_subpage.js
index bd10f26dc15d16223100eb28f79ebf622bd7cbd4..fd9528465c3ebca81fce852c2e1288faa52c85e9 100644
--- a/chrome/browser/resources/settings/internet_page/internet_subpage.js
+++ b/chrome/browser/resources/settings/internet_page/internet_subpage.js
@@ -150,9 +150,9 @@ Polymer({
       return;
     /** @const */ var INTERVAL_MS = 10 * 1000;
     this.networkingPrivate.requestNetworkScan();
-    this.scanIntervalId_ = window.setInterval(function() {
+    this.scanIntervalId_ = window.setInterval(() => {
       this.networkingPrivate.requestNetworkScan();
-    }.bind(this), INTERVAL_MS);
+    }, INTERVAL_MS);
   },
 
   /** @private */
@@ -199,9 +199,9 @@ Polymer({
         visible: true,
         configured: false
       };
-      this.networkingPrivate.getNetworks(filter, function(tetherNetworkStates) {
+      this.networkingPrivate.getNetworks(filter, tetherNetworkStates => {
         this.networkStateList_ = networkStates.concat(tetherNetworkStates);
-      }.bind(this));
+      });
       return;
     }
 
@@ -490,7 +490,7 @@ Polymer({
   /**
    * @param {!CrOnc.DeviceStateProperties|undefined} deviceState
    * @param {!CrOnc.DeviceStateProperties|undefined} tetherDeviceState
-   * @return {boolean}
+   * @return {string}
    * @private
    */
   getNoNetworksString_: function(deviceState, tetherDeviceState) {