Add a snippet item decoration to recycler view for cards and make the card full bleed with a divide…

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

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetItemDecoration.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetItemDecoration.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetItemDecoration.java
new file mode 100644
index 0000000000000000000000000000000000000000..2c080995a3deaa32af0c910140765512e0ecdfe8
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetItemDecoration.java
@@ -0,0 +1,33 @@
+// Copyright 2016 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.content.Context;
+import android.graphics.Rect;
+import android.support.v7.widget.RecyclerView;
+import android.view.View;
+
+import org.chromium.chrome.R;
+
+/**
+ * A class that decorates the RecyclerView elements.
+ */
+public class SnippetItemDecoration extends RecyclerView.ItemDecoration {
+    private final int mVerticalSpace;
+
+    public SnippetItemDecoration(Context context) {
+        this.mVerticalSpace =
+                context.getResources().getDimensionPixelSize(R.dimen.snippets_vertical_space);
+    }
+
+    @Override
+    public void getItemOffsets(Rect outRect, View view, RecyclerView parent,
+            RecyclerView.State state) {
+        if (parent.getChildAdapterPosition(view) != parent.getAdapter().getItemCount() - 1) {
+            outRect.setEmpty();
+            outRect.bottom = mVerticalSpace;
+        }
+    }
+}