Show alert when failed to get token for opening suggested apps dialog.

ui/file_manager/file_manager/foreground/js/ui/suggest_apps_dialog.js

Index: ui/file_manager/file_manager/foreground/js/ui/suggest_apps_dialog.js
diff --git a/ui/file_manager/file_manager/foreground/js/ui/suggest_apps_dialog.js b/ui/file_manager/file_manager/foreground/js/ui/suggest_apps_dialog.js
index ad3c6b54092c09d63cfcae00e7c36fcdef6c3a12..f9a2d9d3055b8cd0e940a436cacd0350bccb34f7 100644
--- a/ui/file_manager/file_manager/foreground/js/ui/suggest_apps_dialog.js
+++ b/ui/file_manager/file_manager/foreground/js/ui/suggest_apps_dialog.js
@@ -237,11 +237,13 @@ SuggestAppsDialog.prototype.showInternal_ =
   }
 
   var dialogShown = false;
+  var tokenObtained = false;
 
   this.widget_.ready()
       .then(
           /** @return {!Promise} */
           function() {
+            tokenObtained = true;
             return this.showDialog_(title);
           }.bind(this))
       .then(
@@ -264,14 +266,22 @@ SuggestAppsDialog.prototype.showInternal_ =
           function(error) {
             console.error('Failed to start CWS widget: ' + error);
 
-            // If the widget dialog was not shown, consider the widget
-            // canceled.
             if (!dialogShown) {
               // Reset any widget state set in |this.widget_.ready()|. The
               // returned value is ignored because it doesn't influence the
               // value reported by dialog.
               this.widget_.finalizeAndGetResult();
-              onDialogClosed(SuggestAppsDialog.Result.CANCELLED, null);
+
+              var result = tokenObtained ?
+                  // Got access token but the widget dialog was not shown.
+                  // Consider the widget was cancelled.
+                  SuggestAppsDialog.Result.CANCELLED :
+                  // Access token was unavailable.
+                  // This can happen in the Guest mode. crbug.com/694419
+                  // Callback shows an alert notifying the file was not opened
+                  // because of the unsupported type.
+                  SuggestAppsDialog.Result.FAILED;
+              onDialogClosed(result, null);
               return;
             }