Show an InfoBar when trying to start Packaged Apps from Metro mode.

apps/app_launch_for_metro_restart_win.h

Index: apps/app_launch_for_metro_restart_win.h
diff --git a/apps/app_launch_for_metro_restart_win.h b/apps/app_launch_for_metro_restart_win.h
new file mode 100644
index 0000000000000000000000000000000000000000..dfbd13ebf6d9b8360e82e548e19b454390b711d1
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+++ b/apps/app_launch_for_metro_restart_win.h
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+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef APPS_APP_LAUNCH_FOR_METRO_RESTART_WIN_H
+#define APPS_APP_LAUNCH_FOR_METRO_RESTART_WIN_H
+
+#include <string>
+
+#include "base/basictypes.h"
+
+class Profile;
+
+namespace apps {
+
+// Handles launching apps on browser startup due to an attempt to launch an app
+// in Windows 8 Metro mode.
+void HandleAppLaunchForMetroRestart(Profile* profile);
+
+// Set a local pref to launch an app before relaunching chrome in desktop mode.
+void SetAppLaunchForMetroRestart(Profile* profile,
+                                 const std::string& extension_id);
+
+}  // namespace apps
+
+#endif  // APPS_APP_LAUNCH_FOR_METRO_RESTART_WIN_H