Bug 1535786 - Fix the missing current date. r=johannh

The solution is to get which of all the errors is being shown in the web page, we can know that resting msg.data.code with the bases and getting which is the name of the parent div where we need to put the date on its child with id="wrongSystemTime_systemDate2".

Differential Revision: https://phabricator.services.mozilla.com/D24363

--HG--
extra : moz-landing-system : lando

browser/actors/NetErrorChild.jsm

@@ -63,7 +63,6 @@ const PREF_SERVICES_SETTINGS_LAST_FETCHED       = "services.settings.last_update
 
 const PREF_SSL_IMPACT_ROOTS = ["security.tls.version.", "security.ssl3."];
 
-
 function getSerializedSecurityInfo(docShell) {
   let serhelper = Cc["@mozilla.org/network/serialization-helper;1"]
                     .getService(Ci.nsISerializationHelper);
@@ -599,7 +598,10 @@ class NetErrorChild extends ActorChild {
           let textContainer = doc.getElementById("text-container");
           errorPageContainer.style.backgroundPosition = `left top calc(50vh - ${textContainer.clientHeight / 2}px)`;
         } else {
-          doc.getElementById("wrongSystemTime_systemDate2").textContent = systemDate;
+          let targetElems = doc.querySelectorAll("#wrongSystemTime_systemDate2");
+          for (let elem of targetElems) {
+            elem.textContent = systemDate;
+          }
 
           let errDesc = doc.getElementById("ed_nssBadCert_SEC_ERROR_EXPIRED_CERTIFICATE");
           let sd = doc.getElementById("errorShortDescText");