Revert of [Chromoting] Retrieve process resource usage (ProcessStats) and its tests

remoting/host/process_stats_sender.h

-// Copyright 2017 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 REMOTING_HOST_PROCESS_STATS_SENDER_H_
-#define REMOTING_HOST_PROCESS_STATS_SENDER_H_
-
-#include <initializer_list>
-#include <vector>
-
-#include "base/threading/thread_checker.h"
-#include "base/time/time.h"
-#include "base/timer/timer.h"
-#include "remoting/proto/process_stats.pb.h"
-#include "remoting/protocol/process_stats_stub.h"
-
-namespace remoting {
-
-class ProcessStatsAgent;
-
-// A component to report process statistic data regularly, it starts immediately
-// after construction, and stops after destruction.
-// All public functions, including constructor and destructor of the object of
-// ProcessStatsSender need to be executed in a same thread.
-class ProcessStatsSender final {
- public:
-  // ProcessStatsSender reports statistic data to |host_stats_stub| once per
-  // |interval|.
-  // ProcessStatsSender does not take the ownership of both |host_stats_stub|
-  // and |agents|. They must outlive the ProcessStatsSender object.
-  ProcessStatsSender(protocol::ProcessStatsStub* host_stats_stub,
-                     base::TimeDelta interval,
-                     std::initializer_list<ProcessStatsAgent*> agents);
-
-  ~ProcessStatsSender();
- private:
-  void ReportUsage();
-
-  protocol::ProcessStatsStub* const host_stats_stub_;
-  std::vector<ProcessStatsAgent*> agents_;
-  base::RepeatingTimer timer_;
-  const base::ThreadChecker thread_checker_;
-};
-
-}  // namespace remoting
-
-#endif  // REMOTING_HOST_PROCESS_STATS_SENDER_H_