Moved IS_EPHEMERAL flag to extension prefs

chrome/browser/ui/views/apps/chrome_native_app_window_views_win.cc

Index: chrome/browser/ui/views/apps/chrome_native_app_window_views_win.cc
diff --git a/chrome/browser/ui/views/apps/chrome_native_app_window_views_win.cc b/chrome/browser/ui/views/apps/chrome_native_app_window_views_win.cc
index dd90d061d33b84a59797a7e182cdb8a6be80fbf6..bf0cdbb768e94f52de93197f67c738088a63d002 100644
--- a/chrome/browser/ui/views/apps/chrome_native_app_window_views_win.cc
+++ b/chrome/browser/ui/views/apps/chrome_native_app_window_views_win.cc
@@ -26,6 +26,7 @@
 #include "chrome/common/chrome_icon_resources_win.h"
 #include "chrome/common/chrome_switches.h"
 #include "content/public/browser/browser_thread.h"
+#include "extensions/browser/extension_util.h"
 #include "extensions/common/extension.h"
 #include "grit/generated_resources.h"
 #include "ui/aura/remote_window_tree_host_win.h"
@@ -230,7 +231,8 @@ void ChromeNativeAppWindowViewsWin::UpdateShelfMenu() {
     return;
 
   // Add item to install ephemeral apps.
-  if (extension->is_ephemeral()) {
+  if (extensions::util::IsEphemeralApp(extension->id(),
+                                       app_window()->browser_context())) {
     scoped_refptr<ShellLinkItem> link(new ShellLinkItem());
     link->set_title(l10n_util::GetStringUTF16(IDS_APP_INSTALL_TITLE));
     link->set_icon(chrome_path.value(),