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

chrome/browser/resources/settings/people_page/import_data_dialog.js

Index: chrome/browser/resources/settings/people_page/import_data_dialog.js
diff --git a/chrome/browser/resources/settings/people_page/import_data_dialog.js b/chrome/browser/resources/settings/people_page/import_data_dialog.js
index 83099cd0cd80cf345ed3da9dc995181af4fdbc2a..d12dfee24b9b468a5abb535238d86088d05e28c7 100644
--- a/chrome/browser/resources/settings/people_page/import_data_dialog.js
+++ b/chrome/browser/resources/settings/people_page/import_data_dialog.js
@@ -53,25 +53,20 @@ Polymer({
   /** @override */
   attached: function() {
     this.browserProxy_ = settings.ImportDataBrowserProxyImpl.getInstance();
-    this.browserProxy_.initializeImportDialog().then(
-        /** @param {!Array<!settings.BrowserProfile>} data */
-        function(data) {
-          this.browserProfiles_ = data;
-          this.selected_ = this.browserProfiles_[0];
-
-          // Show the dialog only after the browser profiles data is populated
-          // to avoid UI flicker.
-          this.$.dialog.showModal();
-        }.bind(this));
-
-    this.addWebUIListener(
-        'import-data-status-changed',
-        /** @param {settings.ImportDataStatus} importStatus */
-        function(importStatus) {
-          this.importStatus_ = importStatus;
-          if (this.hasImportStatus_(settings.ImportDataStatus.FAILED))
-            this.closeDialog_();
-        }.bind(this));
+    this.browserProxy_.initializeImportDialog().then(data => {
+      this.browserProfiles_ = data;
+      this.selected_ = this.browserProfiles_[0];
+
+      // Show the dialog only after the browser profiles data is populated
+      // to avoid UI flicker.
+      this.$.dialog.showModal();
+    });
+
+    this.addWebUIListener('import-data-status-changed', importStatus => {
+      this.importStatus_ = importStatus;
+      if (this.hasImportStatus_(settings.ImportDataStatus.FAILED))
+        this.closeDialog_();
+    });
   },
 
   /** @private */