NTP, change the card elevation from setElevation to a 9 patch file

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

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/CardItemDecoration.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/CardItemDecoration.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/CardItemDecoration.java
deleted file mode 100644
index 1bfee572b2d1e7aa2583d547b4359b5551f3a517..0000000000000000000000000000000000000000
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/CardItemDecoration.java
+++ /dev/null
@@ -1,44 +0,0 @@
-// 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.cards;
-
-import android.content.Context;
-import android.graphics.Rect;
-import android.support.v7.widget.RecyclerView;
-import android.view.View;
-
-import org.chromium.chrome.R;
-
-/**
- * A decorator that places separators between RecyclerView cards.
- */
-public class CardItemDecoration extends RecyclerView.ItemDecoration {
-    private final int mCardsVerticalSpacing;
-
-    /**
-     * @param context used to retrieve resources.
-     */
-    public CardItemDecoration(Context context) {
-        mCardsVerticalSpacing =
-                context.getResources().getDimensionPixelSize(R.dimen.snippets_vertical_spacing);
-    }
-
-    @Override
-    public void getItemOffsets(
-            Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
-        int childPos = parent.getChildAdapterPosition(view);
-
-        // childPos can be NO_POSITION if the method is called with a view being removed from the
-        // RecyclerView, for example when dismissing an item.
-        if (childPos == RecyclerView.NO_POSITION) return;
-
-        // Add spacing if the current item and the next are cards.
-        if (parent.getChildViewHolder(view) instanceof CardViewHolder
-                && parent.findViewHolderForAdapterPosition(childPos + 1)
-                                instanceof CardViewHolder) {
-            outRect.set(0, 0, 0, mCardsVerticalSpacing);
-        }
-    }
-}