Remove document mode opt-out promo.

chrome/android/java/res/layout/new_tab_page.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!-- 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. -->
 
 <org.chromium.chrome.browser.ntp.NewTabPageView
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:chrome="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
@@ skipping 77 matching lines @@
             </LinearLayout>
 
             <!-- Spacer -->
             <View
                 android:id="@+id/ntp_middle_spacer"
                 android:layout_width="0dp"
                 android:layout_height="0dp"
                 android:layout_weight="0"
                 android:visibility="invisible" />
 
-            <!-- Document mode opt out promo -->
-            <ViewStub
-                android:id="@+id/opt_out_promo_stub"
-                android:layout_width="match_parent"
-                android:layout_height="wrap_content"
-                android:inflatedId="@+id/opt_out_promo"
-                android:layout="@layout/opt_out_promo" />
-
             <!-- Most visited items -->
             <org.chromium.chrome.browser.ntp.MostVisitedLayout
                 android:id="@+id/most_visited_layout"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_marginBottom="16dp"
                 android:layout_marginStart="12dp"
                 android:layout_marginEnd="12dp"
                 android:layout_gravity="center_horizontal"
                 android:paddingTop="@dimen/most_visited_layout_padding_top"
@@ skipping 105 matching lines @@
                 android:layout_height="match_parent"
                 android:layout_gravity="center_horizontal"
                 android:drawablePadding="8dp"
                 android:gravity="center_vertical"
                 android:text="@string/recent_tabs"
                 android:textSize="12sp"
                 android:textColor="#5a5a5a" />
         </FrameLayout>
     </org.chromium.chrome.browser.ntp.NewTabPageToolbar>
 </org.chromium.chrome.browser.ntp.NewTabPageView>