Revert "Content handler for python."

mojo/python/content_handler/python_system_impl_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_PYTHON_CONTENT_HANDLER_PYTHON_SYSTEM_IMPL_HELPER_H_
-#define MOJO_PYTHON_CONTENT_HANDLER_PYTHON_SYSTEM_IMPL_HELPER_H_
-
-#include <Python.h>
-
-#include "base/base_export.h"
-#include "base/message_loop/message_loop.h"
-#include "base/run_loop.h"
-#include "mojo/public/cpp/bindings/callback.h"
-#include "mojo/public/cpp/system/core.h"
-#include "mojo/public/python/src/common.h"
-
-namespace mojo {
-namespace python {
-
-// Run loop for python
-class PythonRunLoop {
- public:
-  PythonRunLoop();
-
-  ~PythonRunLoop();
-
-  void Run();
-
-  void RunUntilIdle();
-
-  void Quit();
-
-  // Post a task to be executed roughtly after delay microseconds
-  void PostDelayedTask(PyObject* callable, int64 delay);
- private:
-  base::MessageLoop loop_;
-};
-
-PythonAsyncWaiter* NewAsyncWaiter();
-
-}  // namespace python
-}  // namespace mojo
-
-#endif  // MOJO_PYTHON_CONTENT_HANDLER_PYTHON_SYSTEM_IMPL_HELPER_H_
-