Revert 124797 - Add NetworkList/NetworkMonitor hooks and C++ wrappers.

ppapi/cpp/private/network_monitor_private.h

-// Copyright (c) 2012 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 PPAPI_CPP_PRIVATE_NETWORK_MONITOR_PRIVATE_H_
-#define PPAPI_CPP_PRIVATE_NETWORK_MONITOR_PRIVATE_H_
-
-#include "ppapi/c/private/ppb_network_monitor_private.h"
-#include "ppapi/cpp/resource.h"
-#include "ppapi/cpp/instance_handle.h"
-
-namespace pp {
-
-class Instance;
-
-class NetworkMonitorPrivate : public Resource {
- public:
-  NetworkMonitorPrivate(const InstanceHandle& instance,
-                        PPB_NetworkMonitor_Callback callback,
-                        void* user_data);
-
-  // Returns true if the required interface is available.
-  static bool IsAvailable();
-};
-
-}  // namespace pp
-
-#endif  // PPAPI_CPP_PRIVATE_NETWORK_MONITOR_PRIVATE_H_