Ensure ephemeral apps have dock icons on mac

chrome/browser/web_applications/web_app.h

Index: chrome/browser/web_applications/web_app.h
diff --git a/chrome/browser/web_applications/web_app.h b/chrome/browser/web_applications/web_app.h
index 29e730a017be5f5bcf83590397c4bb87bd4d319c..074d5b7fac9576cbd25248898b2fce20fbd90633 100644
--- a/chrome/browser/web_applications/web_app.h
+++ b/chrome/browser/web_applications/web_app.h
@@ -83,13 +83,12 @@ struct ShortcutLocations {
   // implemented yet.
   bool in_quick_launch_bar;
 
-#if defined(OS_POSIX)
   // For Linux, this refers to a shortcut which the system knows about (for
   // the purpose of identifying windows and giving them the correct
   // title/icon), but which does not show up in menus or search results.
   // Ignored if applications_menu_location is not APP_MENU_LOCATION_NONE.
+  // For Mac, app shims are not placed in locations indexed by the OS.
   bool hidden;
-#endif
 };
 
 // This encodes the cause of shortcut creation as the correct behavior in each