When restoring kiosk app after crash, skip app installation steps

chrome/browser/chromeos/app_mode/app_launch_utils.cc

 // Copyright 2013 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 "chrome/browser/chromeos/app_mode/app_launch_utils.h"
 
 #include "base/macros.h"
 #include "chrome/browser/chromeos/app_mode/kiosk_app_launch_error.h"
 #include "chrome/browser/chromeos/app_mode/startup_app_launcher.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
@@ skipping 25 matching lines @@
   void InitializeNetwork() override {
     // This is on crash-restart path and assumes network is online.
     // TODO(xiyuan): Remove the crash-restart path for kiosk or add proper
     // network configure handling.
     startup_app_launcher_->ContinueWithNetworkReady();
   }
   bool IsNetworkReady() override {
     // See comments above. Network is assumed to be online here.
     return true;
   }
+  bool ShouldSkipAppInstallation() override {
+    // Given that this delegate does not reliably report whether the network is
+    // ready, avoid making app update checks - this might take a while if
+    // network is not online. Also, during crash-restart, we should continue
+    // with the same app version as the restored session.
+    return true;
+  }
   void OnLoadingOAuthFile() override {}
   void OnInitializingTokenService() override {}
   void OnInstallingApp() override {}
   void OnReadyToLaunch() override { startup_app_launcher_->LaunchApp(); }
   void OnLaunchSucceeded() override { Cleanup(); }
   void OnLaunchFailed(KioskAppLaunchError::Error error) override {
     KioskAppLaunchError::Save(error);
     chrome::AttemptUserExit();
     Cleanup();
   }
   bool IsShowingNetworkConfigScreen() override { return false; }
 
   std::unique_ptr<StartupAppLauncher> startup_app_launcher_;
 
   DISALLOW_COPY_AND_ASSIGN(AppLaunchManager);
 };
 
 void LaunchAppOrDie(Profile* profile, const std::string& app_id) {
   // AppLaunchManager manages its own lifetime.
   (new AppLaunchManager(profile, app_id))->Start();
 }
 
 }  // namespace chromeos