WebUI: For cr-dialog, handle Enter keys in paper-inputs.

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

 // Copyright 2016 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.
 
 /**
  * @fileoverview
  *
  * 'settings-password-prompt-dialog' shows a dialog which asks for the user to
  * enter their password. It validates the password is correct. Once the user has
  * entered their account password, the page fires an 'authenticated' event and
@@ skipping 108 matching lines @@
   },
 
   /**
    * Called whenever the dialog is closed.
    * @private
    */
   onClose_: function() {
     this.password_ = '';
   },
 
-  /** @private */
-  onKeydown_: function(e) {
-    if (e.key == 'Enter')
-      this.submitPassword_();
-  },
-
   /**
    * Run the account password check.
    * @private
    */
   submitPassword_: function() {
     clearTimeout(this.clearAccountPasswordTimeout_);
 
     // The user might have started entering a password and then deleted it all.
     // Do not submit/show an error in this case.
     if (!this.password_) {
@@ skipping 59 matching lines @@
     this.quickUnlockPrivate_.getActiveModes(function(modes) {
       var credentials =
           /** @type {!Array<string>} */ (Array(modes.length).fill(''));
       this.quickUnlockPrivate_.setModes(
           this.password_, modes, credentials, onCheck);
     }.bind(this));
   }
 });
 
 })();