arc: Restore UMA statistics for failures in LSO flow.

chrome/browser/resources/chromeos/arc_support/background.js

Index: chrome/browser/resources/chromeos/arc_support/background.js
diff --git a/chrome/browser/resources/chromeos/arc_support/background.js b/chrome/browser/resources/chromeos/arc_support/background.js
index 40d2a296c34d0448f4ba3bce16fae9779f0e7a34..1bbfcc6522c12b8f30b89b1909f1beaff04cc577 100644
--- a/chrome/browser/resources/chromeos/arc_support/background.js
+++ b/chrome/browser/resources/chromeos/arc_support/background.js
@@ -675,7 +675,8 @@ chrome.app.runtime.onLaunched.addListener(function() {
           var authCode = results[0].substring(authCodePrefix.length);
           sendNativeMessage('onAuthSucceeded', {code: authCode});
         } else {
-          showErrorMessage(
+          sendNativeMessage('onAuthFailed');
+          showErrorPage(
               appWindow.contentWindow.loadTimeData.getString(
                   'authorizationFailed'));
         }