Add new NTP layout with snippet cards and hide it behind a flag

chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetListItemViewHolder.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetListItemViewHolder.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetListItemViewHolder.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetListItemViewHolder.java
deleted file mode 100644
index 75dc552711a1baaccfcbf07a3a478d7172559e7d..0000000000000000000000000000000000000000
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetListItemViewHolder.java
+++ /dev/null
@@ -1,46 +0,0 @@
-// Copyright 2015 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.
-
-package org.chromium.chrome.browser.ntp.snippets;
-
-import android.support.v7.widget.RecyclerView;
-import android.view.View;
-
-import org.chromium.chrome.browser.ntp.snippets.SnippetsManager.SnippetListItem;
-
-/**
- * A class that represents an item we want to display in our list of card snippets.
- */
-abstract class SnippetListItemViewHolder extends RecyclerView.ViewHolder {
-    private final SnippetsManager mManager;
-
-    /**
-     * Constructs a SnippetListItemViewHolder item used to display a component in the list of
-     * snippets (e.g., header, article snippet, separator, etc.)
-     *
-     * @param cardView The View for this item
-     * @param manager The SnippetsManager object used to open an article
-     */
-    public SnippetListItemViewHolder(View itemView, SnippetsManager manager) {
-        super(itemView);
-        mManager = manager;
-    }
-
-    /**
-     * Opens the given URL
-     *
-     * @param url The URL to open.
-     */
-    protected void loadUrl(String url) {
-        mManager.loadUrl(url);
-    }
-
-    /**
-     * Called when the snippets adapter is requested to update the currently visible ViewHolder with
-     * data.
-     *
-     * @param article The SnippetListItem object that holds the data for this ViewHolder
-     */
-    public abstract void onBindViewHolder(SnippetListItem snippetItem);
-}