[NTP4] Redesign of notification promo.

chrome/browser/resources/shared/js/cr/ui/card_slider.js

 // Copyright (c) 2012 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 Card slider implementation. Allows you to create interactions
  * that have items that can slide left to right to reveal additional items.
  * Works by adding the necessary event handlers to a specific DOM structure
  * including a frame, container and cards.
  * - The frame defines the boundary of one item. Each card will be expanded to
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     /**
      * Returns the current card itself.
      * @return {!Element} the currently shown card.
      */
     get currentCardValue() {
       return this.cards_[this.currentCard_];
     },
 
     /**
+     * Returns the frame holding the cards.
+     * @return {Element} The frame used to position the cards.
+     */
+    get frame() {
+      return this.frame_;
+    },
+
+    /**
      * Handle horizontal scrolls to flip between pages.
      * @private
      */
     onMouseWheel_: function(e) {
       if (e.wheelDeltaX == 0)
         return;
 
       // Prevent OS X 10.7+ history swiping on the NTP.
       e.preventDefault();
 
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       // Ensure we're at a card bounary
       this.transformToCurrentCard_(true);
     },
   };
 
   return {
     CardSlider: CardSlider
   };
 });