Fix race and remove unused features in cryptotoken extension

chrome/browser/resources/cryptotoken/background.js

Index: chrome/browser/resources/cryptotoken/background.js
diff --git a/chrome/browser/resources/cryptotoken/background.js b/chrome/browser/resources/cryptotoken/background.js
index d197abe8a2cecc966932e7bd0b23825c9f2d4218..0d57f2b9d4ab033d11cfb862ab00c7d7ca462061 100644
--- a/chrome/browser/resources/cryptotoken/background.js
+++ b/chrome/browser/resources/cryptotoken/background.js
@@ -31,15 +31,14 @@ var ENROLL_HELPER_FACTORY = new UsbEnrollHelperFactory(GNUBBY_FACTORY);
  */
 function handleWebPageRequest(toleratesMultipleResponses, request, sender,
     sendResponse) {
-  var enforceAppIdValid = true;
   switch (request.type) {
     case GnubbyMsgTypes.ENROLL_WEB_REQUEST:
       return handleEnrollRequest(ENROLL_HELPER_FACTORY, sender, request,
-          enforceAppIdValid, sendResponse, toleratesMultipleResponses);
+          sendResponse, toleratesMultipleResponses);
 
     case GnubbyMsgTypes.SIGN_WEB_REQUEST:
       return handleSignRequest(SIGN_HELPER_FACTORY, sender, request,
-          enforceAppIdValid, sendResponse, toleratesMultipleResponses);
+          sendResponse, toleratesMultipleResponses);
 
     default:
       var response = formatWebPageResponse(