Add a button to OIB to launch an instant app if it exists.

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

Index: chrome/android/java/res/layout/website_settings.xml
diff --git a/chrome/android/java/res/layout/website_settings.xml b/chrome/android/java/res/layout/website_settings.xml
index 063f53c87db308ae917b5c8adcdfbb323b4b4bd7..08f3a5a5cb4844a014aefb1b3a0ccd6f0fd11929 100644
--- a/chrome/android/java/res/layout/website_settings.xml
+++ b/chrome/android/java/res/layout/website_settings.xml
@@ -5,7 +5,9 @@
    Use of this source code is governed by a BSD-style license that can be
    found in the LICENSE file.
 -->
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout
+    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"
     android:paddingBottom="8dp"
@@ -58,6 +60,23 @@
             android:textSize="14sp" />
     </LinearLayout>
 
+    <org.chromium.ui.widget.ButtonCompat
+        android:id="@+id/website_settings_instant_app_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="start"
+        android:layout_marginEnd="@dimen/website_settings_popup_padding_sides"
+        android:layout_marginStart="@dimen/website_settings_popup_padding_sides"
+        android:layout_marginTop="12dp"
+        android:layout_marginBottom="4dp"
+        android:paddingEnd="@dimen/website_settings_popup_button_padding_sides"
+        android:paddingStart="@dimen/website_settings_popup_button_padding_sides"
+        android:text="@string/page_info_instant_app_button"
+        android:textSize="14sp"
+        android:textColor="@android:color/white"
+        chrome:buttonRaised="false"
+        chrome:buttonColor="@color/app_banner_install_button_bg" />
+
     <LinearLayout
         android:id="@+id/website_settings_permissions_list"
         android:layout_width="match_parent"