Add unit tests for sub-components of CaptureScheduler.

remoting/host/capture_scheduler.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.
 
 // This class chooses a capture interval so as to limit CPU usage to not exceed
 // a specified %age. It bases this on the CPU usage of recent capture and encode
 // operations, and on the number of available CPUs.
 
 #ifndef REMOTING_HOST_CAPTURE_SCHEDULER_H_
 #define REMOTING_HOST_CAPTURE_SCHEDULER_H_
 
 #include "base/time.h"
 #include "remoting/base/running_average.h"
 
 namespace remoting {
 
 class CaptureScheduler {
  public:
   CaptureScheduler();
   ~CaptureScheduler();
 
-  // Determine the time delay from current time to perform next capture.
+  // Returns the time to wait after initiating the a capture before triggering
+  // the next.
   base::TimeDelta NextCaptureDelay();
 
-  // Record time spent on capturing and encoding.
+  // Records time spent on capturing and encoding.
   void RecordCaptureTime(base::TimeDelta capture_time);
   void RecordEncodeTime(base::TimeDelta encode_time);
 
+  // Overrides the number of processors for testing.
+  void SetNumOfProcessorsForTest(int num_of_processors);
+
  private:
   int num_of_processors_;
   RunningAverage capture_time_;
   RunningAverage encode_time_;
 
   DISALLOW_COPY_AND_ASSIGN(CaptureScheduler);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_CAPTURE_SCHEDULER_H_