Bug 1120051 - Replace nonstandard let block and legacy generator in ForgetAboutSite.jsm. r=Mossop

toolkit/forgetaboutsite/ForgetAboutSite.jsm

@@ -81,10 +81,9 @@ this.ForgetAboutSite = {
     }
 
     // EME
-    let (mps = Cc["@mozilla.org/gecko-media-plugin-service;1"].
-               getService(Ci.mozIGeckoMediaPluginService)) {
-      mps.forgetThisSite(aDomain);
-    }
+    let mps = Cc["@mozilla.org/gecko-media-plugin-service;1"].
+               getService(Ci.mozIGeckoMediaPluginService);
+    mps.forgetThisSite(aDomain);
 
     // Plugin data
     const phInterface = Ci.nsIPluginHost;
@@ -109,7 +108,7 @@ this.ForgetAboutSite = {
     }
 
     if (useJSTransfer) {
-      Task.spawn(function() {
+      Task.spawn(function*() {
         let list = yield Downloads.getList(Downloads.ALL);
         list.removeFinished(download => hasRootDomain(
              NetUtil.newURI(download.source.url).host, aDomain));