Show notification instead of opening app launcher after extension installation

extensions/browser/api/app_runtime/app_runtime_api.cc

 // Copyright 2014 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.
 
 #include "extensions/browser/api/app_runtime/app_runtime_api.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 96 matching lines @@
     case extensions::SOURCE_EPHEMERAL_APP_DEPRECATED:
       return app_runtime::LAUNCH_SOURCE_EPHEMERAL_APP;
     case extensions::SOURCE_BACKGROUND:
       return app_runtime::LAUNCH_SOURCE_BACKGROUND;
     case extensions::SOURCE_KIOSK:
       return app_runtime::LAUNCH_SOURCE_KIOSK;
     case extensions::SOURCE_CHROME_INTERNAL:
       return app_runtime::LAUNCH_SOURCE_CHROME_INTERNAL;
     case extensions::SOURCE_TEST:
       return app_runtime::LAUNCH_SOURCE_TEST;
+    case extensions::SOURCE_INSTALLED_NOTIFICATION:
+      return app_runtime::LAUNCH_SOURCE_INSTALLED_NOTIFICATION;
 
     default:
       return app_runtime::LAUNCH_SOURCE_NONE;
   }
 }
 
 }  // namespace
 
 // static
 void AppRuntimeEventRouter::DispatchOnEmbedRequestedEvent(
@@ skipping 82 matching lines @@
   launch_data.url.reset(new std::string(url.spec()));
   launch_data.referrer_url.reset(new std::string(referrer_url.spec()));
   if (extensions::FeatureSwitch::trace_app_source()->IsEnabled()) {
     launch_data.source = source_enum;
   }
   DispatchOnLaunchedEventImpl(extension->id(), source_enum,
                               launch_data.ToValue(), context);
 }
 
 }  // namespace extensions