headless: Librarify Headless Shell

headless/public/headless_shell.h

Index: headless/public/headless_shell.h
diff --git a/headless/public/headless_shell.h b/headless/public/headless_shell.h
new file mode 100644
index 0000000000000000000000000000000000000000..f083d2030c1057d70fdfdd4ccd364e671c505f7a
--- /dev/null
+++ b/headless/public/headless_shell.h
@@ -0,0 +1,18 @@
+// Copyright 2016 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 HEADLESS_PUBLIC_HEADLESS_SHELL_H_
+#define HEADLESS_PUBLIC_HEADLESS_SHELL_H_
+
+#include "headless/public/headless_export.h"
+
+namespace headless {
+
+// Start the Headless Shell application. Intended to be called early in main().
+// Returns the exit code for the process.
+int HEADLESS_EXPORT HeadlessShellMain(int argc, const char** argv);
+
+}  // namespace headless
+
+#endif  // HEADLESS_PUBLIC_HEADLESS_SHELL_H_