WebUI: Enable ESLint rule for missing semicolons.

chrome/browser/resources/chromeos/login/oobe_screen_oauth_enrollment.js

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 login.createScreen('OAuthEnrollmentScreen', 'oauth-enrollment', function() {
   /* Code which is embedded inside of the webview. See below for details.
   /** @const */ var INJECTED_WEBVIEW_SCRIPT = String.raw`
                       (function() {
                          // <include src="../keyboard/keyboard_utils.js">
                          keyboard.initializeKeyboardFlow(true);
@@ skipping 33 matching lines @@
      * The current step. This is the last value passed to showStep().
      */
     currentStep_: null,
 
     /**
      * We block esc, back button and cancel button until gaia is loaded to
      * prevent multiple cancel events.
      */
     isCancelDisabled_: null,
 
-    get isCancelDisabled() { return this.isCancelDisabled_ },
+    get isCancelDisabled() { return this.isCancelDisabled_; },
     set isCancelDisabled(disabled) {
       this.isCancelDisabled_ = disabled;
     },
 
     isManualEnrollment_: undefined,
 
     /**
      * An element containg navigation buttons.
      */
     navigation_: undefined,
@@ skipping 377 matching lines @@
       this.navigation_.closeVisible =
           (this.currentStep_ == STEP_SIGNIN ||
            this.currentStep_ == STEP_ERROR ||
            this.currentStep_ == STEP_ACTIVE_DIRECTORY_JOIN_ERROR ||
            this.currentStep_ == STEP_AD_JOIN) &&
           !this.navigation_.refreshVisible;
       $('login-header-bar').updateUI_();
     }
   };
 });