fix(UI): Show GB unit in StatisticsButton (#7990)

Author: avelad

ui/statistics_button.js

@@ -119,7 +119,9 @@ shaka.ui.StatisticsButton = class extends shaka.ui.Element {
 
     const parseBytesDownloaded = (name) => {
       const bytes = parseInt(this.currentStats_[name], 10);
-      if (bytes > 1e6) {
+      if (bytes > 2 * 1e9) {
+        return (bytes / 1e9).toFixed(2) + 'GB';
+      } else if (bytes > 1e6) {
         return (bytes / 1e6).toFixed(2) + 'MB';
       } else if (bytes > 1e3) {
         return (bytes / 1e3).toFixed(2) + 'KB';