Add two more options for the --password-store switch

components/os_crypt/key_storage_util_linux.h

Index: components/os_crypt/key_storage_util_linux.h
diff --git a/components/os_crypt/key_storage_util_linux.h b/components/os_crypt/key_storage_util_linux.h
new file mode 100644
index 0000000000000000000000000000000000000000..1bc741dbc81da0ead295a2abcc8e29d00cc0e799
--- /dev/null
+++ b/components/os_crypt/key_storage_util_linux.h
@@ -0,0 +1,31 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.

[Lei Zhang, 2016/08/17 14:36:25]

Probably good to put the bits in this file inside namespace os_crypt.
"SelectBackend()" is rather generic.

[cfroussios, 2016/08/17 15:04:33]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef COMPONENTS_OS_CRYPT_KEY_STORAGE_UTIL_LINUX_H_
+#define COMPONENTS_OS_CRYPT_KEY_STORAGE_UTIL_LINUX_H_
+
+#include <string>
+
+#include "base/nix/xdg_util.h"
+
+// The supported Linux backends for storing passwords.
+enum class SelectedLinuxBackend {
+  DEFER,  // No selection
+  BASIC_TEXT,
+  GNOME_ANY,  // GNOME_KEYRING or GNOME_LIBSECRET, whichever is available.
+  GNOME_KEYRING,
+  GNOME_LIBSECRET,
+  KWALLET,
+  KWALLET5,
+};
+
+// Decide which backend to target. |command| is checked first. If it does not

[Lei Zhang, 2016/08/17 14:36:25]

Maybe s/command/type/ ?

[cfroussios, 2016/08/17 15:04:33]

Done.

+// match a supported backend, |desktop_env| will be used to decide.
+// TODO(crbug/571003): This is exposed as a utility only for password manager to
+// use. It should be merged in key_storage_linux, once no longer needed in
+// password manager.
+SelectedLinuxBackend SelectBackend(const std::string& command,
+                                   base::nix::DesktopEnvironment desktop_env);
+
+#endif  // COMPONENTS_OS_CRYPT_KEY_STORAGE_UTIL_LINUX_H_