Upstream: Renderers are running in WebAPKs.

chrome/android/webapk/shell_apk/AndroidManifest.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.
 -->
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     package="{{ manifest_package }}"
     android:versionCode="1"
     android:versionName="1.0" >
@@ skipping 24 matching lines @@
         <meta-data android:name="scope" android:value="{{ scope_url }}" />
         <service
             android:name="org.chromium.webapk.shell_apk.WebApkServiceFactory"
             android:exported="true"
             tools:ignore="ExportedService">
             <intent-filter>
               <action android:name="android.intent.action.MAIN" />
               <category android:name="android.intent.category.WEBAPK_API" />
             </intent-filter>
         </service>
+        <meta-data android:name="org.chromium.content.browser.NUM_SANDBOXED_SERVICES"
+            android:value="3"/>
+        <meta-data android:name="org.chromium.content.browser.SANDBOXED_SERVICES_NAME"
+            android:value="org.chromium.webapk.lib.common.WebApkSandboxedProcessService"/>
+        <service android:name="org.chromium.webapk.lib.common.WebApkSandboxedProcessService0"
+            android:isolatedProcess="true"
+            android:process=":webapk_sandboxed_process0"
+            android:exported="true"
+            tools:ignore="ExportedService"/>
+        <service android:name="org.chromium.webapk.lib.common.WebApkSandboxedProcessService1"
+            android:isolatedProcess="true"
+            android:process=":webapk_sandboxed_process1"
+            android:exported="true"
+            tools:ignore="ExportedService"/>
+        <service android:name="org.chromium.webapk.lib.common.WebApkSandboxedProcessService2"
+            android:isolatedProcess="true"
+            android:process=":webapk_sandboxed_process2"
+            android:exported="true"
+            tools:ignore="ExportedService"/>
     </application>
 </manifest>