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

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

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/SuggestionsSection.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/SuggestionsSection.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/SuggestionsSection.java
index 85540c7dfd12a4cb3bf70173fee29b7ce0d345b6..f4502db3d3259e196f139615cca05c5934f239c8 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/SuggestionsSection.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/SuggestionsSection.java
@@ -137,7 +137,6 @@ public class SuggestionsSection extends InnerNode {
             ((SnippetArticleViewHolder) holder).onBindViewHolder(suggestion, mCategoryInfo);
         }
 
-        @Override
         public SnippetArticle getSuggestionAt(int position) {
             return mSuggestions.get(position);
         }
@@ -181,6 +180,13 @@ public class SuggestionsSection extends InnerNode {
         }
 
         @Override
+        public void visitItems(NodeVisitor visitor) {
+            for (SnippetArticle suggestion : mSuggestions) {
+                visitor.visitSuggestion(suggestion);
+            }
+        }
+
+        @Override
         public Set<Integer> getItemDismissalGroup(int position) {
             return Collections.singleton(position);
         }
@@ -323,7 +329,7 @@ public class SuggestionsSection extends InnerNode {
         }
     }
 
-    public boolean hasSuggestions() {
+    private boolean hasSuggestions() {
         return mSuggestionsList.getItemCount() != 0;
     }