Automatic Win8 default browser registration for the ash unittests.

win8/test/metro_registration_helper.h

Index: win8/test/metro_registration_helper.h
diff --git a/win8/test/metro_registration_helper.h b/win8/test/metro_registration_helper.h
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+// Copyright (c) 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 WIN8_TEST_METRO_REGISTRATION_HELPER_H_
+#define WIN8_TEST_METRO_REGISTRATION_HELPER_H_
+
+#include "base/string16.h"
+
+namespace win8 {
+
+// Registers a viewer process as a potential Win8 default browser. Intended to
+// be used by a test binary in the build output directory and assumes the
+// presence of test_registrar.exe, a viewer process and all needed DLLs in the
+// same directory as the calling module. The viewer process is then subsequently
+// set as THE default Win8 browser, is activatable using the AppUserModelId in
+// |app_user_model_id| and will show up in the default browser selection dialog
+// as |viewer_process_name|.
+//
+// See also open_with_dialog_controller.h for a mechanism for setting THE
+// default Win8 browser.
+bool RegisterTestDefaultBrowser(const string16& app_user_model_id,
+                                const string16& viewer_process_name);
+
+}  // namespace win8
+
+#endif  // WIN8_TEST_METRO_REGISTRATION_HELPER_H_