📰 Add an action button that can be used in sections

chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/NewTabPageListItem.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/NewTabPageListItem.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/NewTabPageListItem.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/NewTabPageListItem.java
index 9a73f1377c98dd71970f3b0b8e0b930ff0331754..ce96a5b76e2b37dfd300622b023bb52e9cbc6c60 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/NewTabPageListItem.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/NewTabPageListItem.java
@@ -18,7 +18,7 @@
      * @see NewTabPageListItem#getType()
      */
     @IntDef({VIEW_TYPE_ABOVE_THE_FOLD, VIEW_TYPE_HEADER, VIEW_TYPE_SNIPPET, VIEW_TYPE_SPACING,
-            VIEW_TYPE_STATUS, VIEW_TYPE_PROGRESS})
+            VIEW_TYPE_STATUS, VIEW_TYPE_PROGRESS, VIEW_TYPE_ACTION})
     @Retention(RetentionPolicy.SOURCE)
     public @interface ViewType {}
 
@@ -59,6 +59,12 @@
     public static final int VIEW_TYPE_PROGRESS = 6;
 
     /**
+     * View type for a {@link ActionListItem}, an action button.
+     * @see Adapter#getItemViewType(int)
+     */
+    public static final int VIEW_TYPE_ACTION = 7;
+
+    /**
       * Returns the type ({@link ViewType}) of this list item. This is so we can
       * distinguish between different elements that are held in a single RecyclerView holder.
       *