Make AllDismissedItem and Footer optional leaves.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/AllDismissedItem.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/AllDismissedItem.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/AllDismissedItem.java
index d9a0895d4e4a82dc1b33830f0030b40ff5b1c846..08404c3fb95a8ded578aac116ca63e405fe955d6 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/AllDismissedItem.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/AllDismissedItem.java
@@ -22,7 +22,14 @@ import java.util.Calendar;
  * Displayed when all suggested content and their sections have been dismissed. Provides a button
  * to restore the dismissed sections and load new suggestions from the server.
  */
-public class AllDismissedItem extends Leaf {
+public class AllDismissedItem extends OptionalLeaf {
+    /**
+     * @param parent The item's parent node.
+     */
+    public AllDismissedItem(NodeParent parent) {
+        super(parent);
+    }
+
     @Override
     @ItemViewType
     public int getItemViewType() {