Bug 1432928 - Use nsIURIMutator in extensions.xml::refreshInfo r=mossop

MozReview-Commit-ID: GN4PXoWkX8V

--HG--
extra : rebase_source : 33709d70cfe24eb5173bb8c89c3bec07848d7438

toolkit/mozapps/extensions/content/extensions.xml

@@ -1930,11 +1930,13 @@
             if (this.mInstall.name) {
               this._name.value = this.mInstall.name;
             } else if (this.mInstall.sourceURI) {
-              var url = Components.classes["@mozilla.org/network/standard-url;1"]
-                                  .createInstance(Components.interfaces.nsIStandardURL);
-              url.init(url.URLTYPE_STANDARD, 80, this.mInstall.sourceURI.spec,
-                       null, null);
-              url.QueryInterface(Components.interfaces.nsIURL);
+              var url = Components.classes["@mozilla.org/network/standard-url-mutator;1"]
+                                  .createInstance(Components.interfaces.nsIStandardURLMutator)
+                                  .init(Components.interfaces.nsIStandardURL.URLTYPE_STANDARD,
+                                        80, this.mInstall.sourceURI.spec,
+                                        null, null)
+                                  .finalize()
+                                  .QueryInterface(Components.interfaces.nsIURL);
               this._name.value = url.fileName;
             }
           }