Add offline_mode support in crxless apps

chrome/common/web_apps.h

Index: chrome/common/web_apps.h
diff --git a/chrome/common/web_apps.h b/chrome/common/web_apps.h
index 2d8d01ec54f9e1e5b55512ea531172d332420356..4cb999e8af8cc393ca2995c0d9bf059a4160de56 100644
--- a/chrome/common/web_apps.h
+++ b/chrome/common/web_apps.h
@@ -75,6 +75,9 @@ struct WebApplicationInfo {
   // The type of launch container to use with the app. Currently supported
   // values are 'tab' and 'panel'. Only supported with manifest-based apps.
   std::string launch_container;
+
+  // This indicates if the app is functional in offline mode or not.
+  bool is_offline_enabled;
 };