MD History/Downloads: convert .bind(this) and function property values to use =>

chrome/browser/resources/md_history/synced_device_manager.js

Index: chrome/browser/resources/md_history/synced_device_manager.js
diff --git a/chrome/browser/resources/md_history/synced_device_manager.js b/chrome/browser/resources/md_history/synced_device_manager.js
index 6dd7f7881bc2bb6b6a4acfffe6ed9d24b49dd500..2782defb8a99a272e73b1fa53dc3e4f90b8b09f7 100644
--- a/chrome/browser/resources/md_history/synced_device_manager.js
+++ b/chrome/browser/resources/md_history/synced_device_manager.js
@@ -28,7 +28,7 @@ Polymer({
      * An array of synced devices with synced tab data.
      * @type {!Array<!ForeignDeviceInternal>}
      */
-    syncedDevices_: {type: Array, value: function() { return []; }},
+    syncedDevices_: {type: Array, value: () => []},
 
     /** @private */
     signInState: {
@@ -167,12 +167,8 @@ Polymer({
     this.debounce('updateFocusGrid', function() {
       Polymer.dom(this.root)
           .querySelectorAll('history-synced-device-card')
-          .reduce(
-              function(prev, cur) {
-                return prev.concat(cur.createFocusRows());
-              },
-              [])
-          .forEach(function(row) { this.focusGrid_.addRow(row); }.bind(this));
+          .reduce((prev, cur) => prev.concat(cur.createFocusRows()), [])
+          .forEach(row => this.focusGrid_.addRow(row));
       this.focusGrid_.ensureRowActive();
     });
   },
@@ -257,11 +253,11 @@ Polymer({
     }
 
     var devices = [];
-    sessionList.forEach(function(session) {
+    sessionList.forEach(session => {
       var device = this.createInternalDevice_(session);
       if (device.tabs.length != 0)
         devices.push(device);
-    }.bind(this));
+    });
 
     this.syncedDevices_ = devices;
   },