Display dialog when app install succeeds / fails on Athena

chrome/browser/ui/extensions/extension_install_ui_default.h

Index: chrome/browser/ui/extensions/extension_install_ui_default.h
diff --git a/chrome/browser/ui/extensions/extension_install_ui_default.h b/chrome/browser/ui/extensions/extension_install_ui_default.h
index e93da665d29c29dc9a671394845f77e9c6052b67..65a92c58a8a9dc80e3a1462ffc5e216bcff928cf 100644
--- a/chrome/browser/ui/extensions/extension_install_ui_default.h
+++ b/chrome/browser/ui/extensions/extension_install_ui_default.h
@@ -22,6 +22,8 @@ class ExtensionInstallUIDefault : public ExtensionInstallUI {
   virtual void OnInstallFailure(
       const extensions::CrxInstallerError& error) override;
   virtual void SetUseAppInstalledBubble(bool use_bubble) override;
+  virtual void OpenAppInstalledUI(const std::string& app_id) override;
+  virtual ExtensionInstallPrompt* CreateInstallPrompt() override;
 
  private:
   // Used to undo theme installation.