Issue 4580 - Replace ext.backgroundPage.sendMessage with runtime.sendMessage

firstRun.js

Index: firstRun.js
===================================================================
--- a/firstRun.js
+++ b/firstRun.js
@@ -50,17 +50,17 @@
       setLinks("acceptable-ads-explanation", link, openFilters);
     });
 
     getDocLink("contribute", (link) =>
     {
       setLinks("share-headline", link);
     });
 
-    ext.backgroundPage.sendMessage({
+    chrome.runtime.sendMessage({
       type: "app.get",
       what: "issues"
     }, (issues) =>
     {
       // Show warning if filterlists settings were reinitialized
       if (issues.filterlistsReinitialized)
       {
         E("filterlistsReinitializedWarning").removeAttribute("hidden");
@@ -72,17 +72,17 @@
 
     ext.onMessage.addListener((message) =>
     {
       if (message.type == "subscriptions.respond")
       {
         updateSocialLinks();
       }
     });
-    ext.backgroundPage.sendMessage({
+    chrome.runtime.sendMessage({
       type: "subscriptions.listen",
       filter: ["added", "removed", "updated", "disabled"]
     });
   }
 
   function updateSocialLinks()
   {
     for (let network of ["twitter", "facebook", "gplus"])
@@ -109,13 +109,13 @@
     getDocLink(event.target.id, (link) =>
     {
       openSharePopup(link);
     });
   }
 
   function openFilters()
   {
-    ext.backgroundPage.sendMessage({type: "app.open", what: "options"});
+    chrome.runtime.sendMessage({type: "app.open", what: "options"});
   }
 
   document.addEventListener("DOMContentLoaded", onDOMLoaded, false);
 }());