arc: Restore UMA statistics for failures in LSO flow.

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

 // Copyright 2016 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.
 
 /**
  * Chrome window that hosts UI. Only one window is allowed.
  * @type {chrome.app.window.AppWindow}
  */
 var appWindow = null;
 
@@ skipping 657 matching lines @@
         return;
       }
 
       lsoView.executeScript({code: 'document.title;'}, function(results) {
         var authCodePrefix = 'Success code=';
         if (results && results.length == 1 && typeof results[0] == 'string' &&
             results[0].substring(0, authCodePrefix.length) == authCodePrefix) {
           var authCode = results[0].substring(authCodePrefix.length);
           sendNativeMessage('onAuthSucceeded', {code: authCode});
         } else {
-          showErrorMessage(
+          sendNativeMessage('onAuthFailed');
+          showErrorPage(
               appWindow.contentWindow.loadTimeData.getString(
                   'authorizationFailed'));
         }
       });
     };
 
     var requestFilter = {
       urls: ['<all_urls>'],
       types: ['main_frame']
     };
@@ skipping 56 matching lines @@
       type: 'chrome',
       color: '#ffffff'
     },
     'innerBounds': {
       'width': INNER_WIDTH,
       'height': INNER_HEIGHT
     }
   };
   chrome.app.window.create('main.html', options, onWindowCreated);
 });