Bug 1045919 - JavaScript Error: "TypeError: AppWindowManager.getActiveApp(...) is null" {file: "app://system.gaiamobile.org/js/activity_window_manager.js"
Merge pull request #22295 from cctuan/1045919

Bug 1045919 - JavaScript Error: "TypeError: AppWindowManager.getActiveApp(...) is null" {file: "app://system.gaiamobile.org/js/activity_window_manager.js"