Implement "appinstalled" event on Android.

chrome/browser/android/webapps/add_to_homescreen_manager.h

 // 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.
 
 #ifndef CHROME_BROWSER_ANDROID_WEBAPPS_ADD_TO_HOMESCREEN_MANAGER_H_
 #define CHROME_BROWSER_ANDROID_WEBAPPS_ADD_TO_HOMESCREEN_MANAGER_H_
 
 #include "base/android/jni_android.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/macros.h"
 #include "chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h"
+#include "third_party/WebKit/public/platform/modules/installation/installation.mojom.h"
 
 namespace content {
 class WebContents;
 }
 
 namespace IPC {
 class Message;
 }
 
 class GURL;
@@ skipping 52 matching lines @@
   // Whether the user has requested that a shortcut be added while a fetch was
   // in progress.
   bool add_shortcut_pending_;
 
   // Whether the site is WebAPK-compatible.
   bool is_webapk_compatible_;
 
   // Fetches data required to add a shortcut.
   scoped_refptr<AddToHomescreenDataFetcher> data_fetcher_;
 
+  // Service to send events to the renderer.
+  blink::mojom::InstallationServicePtr installation_service_;
+
   DISALLOW_COPY_AND_ASSIGN(AddToHomescreenManager);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_WEBAPPS_ADD_TO_HOMESCREEN_MANAGER_H_