Deprecate NonThreadSafe in remoting in favor of SequenceChecker.

remoting/base/rate_counter.h

 // Copyright (c) 2011 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_BASE_RATE_COUNTER_H_
 #define REMOTING_BASE_RATE_COUNTER_H_
 
 #include <stdint.h>
 
 #include <queue>
 #include <utility>
 
 #include "base/macros.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 #include "base/time/default_tick_clock.h"
 #include "base/time/tick_clock.h"
 #include "base/time/time.h"
 
 namespace remoting {
 
 // Measures average rate per second of a sequence of point rate samples
 // over a specified time window. This can be used to measure bandwidth, frame
 // rates, etc.
-class RateCounter : public base::NonThreadSafe {
+class RateCounter {
  public:
   // Constructs a rate counter over the specified |time_window|.
   explicit RateCounter(base::TimeDelta time_window);
   virtual ~RateCounter();
 
   // Records a point event count to include in the rate.
   void Record(int64_t value);
 
   // Returns the rate-per-second of values recorded over the time window.
   // Note that rates reported before |time_window| has elapsed are not accurate.
@@ skipping 15 matching lines @@
 
   // Queue containing data points in the order in which they were recorded.
   std::queue<DataPoint> data_points_;
 
   // Sum of values in |data_points_|.
   int64_t sum_;
 
   base::DefaultTickClock default_tick_clock_;
   base::TickClock* tick_clock_ = &default_tick_clock_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   DISALLOW_COPY_AND_ASSIGN(RateCounter);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_BASE_RATE_COUNTER_H_