[Merge to M59] Feedback: User email section should only be visible when useful

chrome/browser/resources/feedback/js/feedback.js

Index: chrome/browser/resources/feedback/js/feedback.js
diff --git a/chrome/browser/resources/feedback/js/feedback.js b/chrome/browser/resources/feedback/js/feedback.js
index cb51b9629910f70da86451009b12e0717b8dffd6..a60b24a0ac46b17ea3beed7003c3b777eb89d27d 100644
--- a/chrome/browser/resources/feedback/js/feedback.js
+++ b/chrome/browser/resources/feedback/js/feedback.js
@@ -354,6 +354,9 @@ function initialize() {
         // Make sure the "Report anonymously" option comes last.
         $('user-email-drop-down').insertBefore(optionElement,
             $('anonymous-user-option'));
+
+        // Now we can unhide the user email section:
+        $('user-email').hidden = false;
       });
 
       // Initiate getting the system info.