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

chrome/browser/chromeos/app_mode/startup_app_launcher.h

Index: chrome/browser/chromeos/app_mode/startup_app_launcher.h
diff --git a/chrome/browser/chromeos/app_mode/startup_app_launcher.h b/chrome/browser/chromeos/app_mode/startup_app_launcher.h
index 49a7f62b79b6129b3608c54feb0d6a696e806854..0f567b5f99215967f114f4f74f045c365a70b5e0 100644
--- a/chrome/browser/chromeos/app_mode/startup_app_launcher.h
+++ b/chrome/browser/chromeos/app_mode/startup_app_launcher.h
@@ -46,6 +46,10 @@ class StartupAppLauncher : public base::SupportsWeakPtr<StartupAppLauncher>,
     // 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;