cros: Clean up screenlockPrivate plumbing.

chrome/browser/resources/login/user_pod_row.js

 // Copyright 2014 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 User pod row implementation.
  */
 
 cr.define('login', function() {
   /**
@@ skipping 169 matching lines @@
       this.actionBoxMenuRemoveElement.addEventListener('keydown',
           this.handleRemoveCommandKeyDown_.bind(this));
       this.actionBoxMenuRemoveElement.addEventListener('blur',
           this.handleRemoveCommandBlur_.bind(this));
 
       if (this.actionBoxRemoveUserWarningButtonElement) {
         this.actionBoxRemoveUserWarningButtonElement.addEventListener(
             'click',
             this.handleRemoveUserConfirmationClick_.bind(this));
       }
-
-      this.customButtonElement.addEventListener('click',

[Tim Song, 2014/05/16 18:38:47]

It's also worth changing the HTML and CSS, so this isn't a button anymore. This
element should be renamed something more meaningful now that it's not a button.

[xiyuan, 2014/05/16 23:00:56]

CustomButton -> CustomIcon
<button> -> <div>
<img> is removed and icon is shown as the div's background image.

-          this.handleCustomButtonClick_.bind(this));
     },
 
     /**
      * Initializes the pod after its properties set and added to a pod row.
      */
     initialize: function() {
       this.passwordElement.addEventListener('keydown',
           this.parentNode.handleKeyDown.bind(this.parentNode));
       this.passwordElement.addEventListener('keypress',
           this.handlePasswordKeyPress_.bind(this));
@@ skipping 671 matching lines @@
     handlePodKeyDown_: function(e) {
       if (!this.isAuthTypeUserClick || this.disabled)
         return;
       switch (e.keyIdentifier) {
         case 'Enter':
         case 'U+0020':  // Space
           if (this.parentNode.isFocused(this))
             this.parentNode.setActivatedPod(this);
           break;
       }
-    },
-
-    /**
-     * Called when the custom button is clicked.
-     */
-    handleCustomButtonClick_: function() {
-      chrome.send('customButtonClicked', [this.user.username]);
     }
   };
 
   /**
    * Creates a public account user pod.
    * @constructor
    * @extends {UserPod}
    */
   var PublicAccountUserPod = cr.ui.define(function() {
     var node = UserPod();
@@ skipping 1348 matching lines @@
       if (this.podsWithPendingImages_.length == 0) {
         this.classList.remove('images-loading');
       }
     }
   };
 
   return {
     PodRow: PodRow
   };
 });