Bug 910597 - Downloaded amount is always reported as unknown size. r=mbrubeck

browser/metro/base/content/Util.js

@@ -176,7 +176,7 @@ let Util = {
    */
   getDownloadSize: function dv__getDownloadSize (aSize) {
     let [size, units] = DownloadUtils.convertByteUnits(aSize);
-    if (size > 0)
+    if (aSize > 0)
       return size + units;
     else
       return Strings.browser.GetStringFromName("downloadsUnknownSize");

browser/metro/components/HelperAppDialog.js

@@ -44,7 +44,8 @@ HelperAppLauncherDialog.prototype = {
 
   _getDownloadSize: function dv__getDownloadSize (aSize) {
     let displaySize = DownloadUtils.convertByteUnits(aSize);
-    if (!isNaN(displaySize[0]) && displaySize[0] > 0) // [0] is size, [1] is units
+    // displaySize[0] is formatted size, displaySize[1] is units
+    if (aSize > 0)
       return displaySize.join("");
     else {
       let browserBundle = Services.strings.createBundle("chrome://browser/locale/browser.properties");