When restoring kiosk app after crash, skip app installation steps. Installed apps should already be…

chrome/browser/chromeos/app_mode/startup_app_launcher.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_APP_MODE_STARTUP_APP_LAUNCHER_H_
 #define CHROME_BROWSER_CHROMEOS_APP_MODE_STARTUP_APP_LAUNCHER_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 28 matching lines @@
  public:
   class Delegate {
    public:
     // Invoked to perform actual network initialization work. Note the app
     // launch flow is paused until ContinueWithNetworkReady is called.
     virtual void InitializeNetwork() = 0;
 
     // Returns true if Internet is online.
     virtual bool IsNetworkReady() = 0;
 
+    // Whether app launch flow can assume all required apps are installed, and
+    // skip app installation steps.
+    virtual bool ShouldSkipAppInstallation() = 0;
+
     virtual void OnLoadingOAuthFile() = 0;
     virtual void OnInitializingTokenService() = 0;
     virtual void OnInstallingApp() = 0;
     virtual void OnReadyToLaunch() = 0;
     virtual void OnLaunchSucceeded() = 0;
     virtual void OnLaunchFailed(KioskAppLaunchError::Error error) = 0;
     virtual bool IsShowingNetworkConfigScreen() = 0;
 
    protected:
     virtual ~Delegate() {}
@@ skipping 96 matching lines @@
 
   KioskOAuthParams auth_params_;
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(StartupAppLauncher);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_APP_MODE_STARTUP_APP_LAUNCHER_H_