mojo: Add a runloop utility in python

mojo/public/python/src/python_system_helper.h

+// Copyright 2014 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 MOJO_PUBLIC_PYTHON_SRC_PYTHON_SYSTEM_HELPER_H_
+#define MOJO_PUBLIC_PYTHON_SRC_PYTHON_SYSTEM_HELPER_H_
+
+#include "Python.h"
+
+#include "mojo/public/cpp/bindings/callback.h"
+
+namespace mojo {
+
+// Create a mojo::Closure from a callable python object.
+mojo::Closure BuildClosure(PyObject* callable);
+
+// Initalize mojo::RunLoop
+void InitRunLoop();
+
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_PYTHON_SRC_PYTHON_SYSTEM_HELPER_H_