[Suggestions] Remove TreeNode.getSuggestionAt() in favor of a visitor.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/AboveTheFoldItem.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/AboveTheFoldItem.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/AboveTheFoldItem.java
index 6b454f8d70129b1f484b26081783b341223981b3..eba86ab2ffcb92b54e32deb078102ab6d106faf4 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/AboveTheFoldItem.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/AboveTheFoldItem.java
@@ -24,4 +24,9 @@ class AboveTheFoldItem extends Leaf {
     protected void onBindViewHolder(NewTabPageViewHolder holder) {
         // Nothing to do.
     }
+
+    @Override
+    public void visitItems(NodeVisitor visitor) {
+        visitor.visitAboveTheFoldItem();
+    }
 }