Update VirtualSocketServerTest to use a fake clock.

webrtc/base/timeutils.h

 /*
  *  Copyright 2005 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 35 matching lines @@
 //
 // This method is not thread-safe; it should only be used when no other thread
 // is running (for example, at the start/end of a unit test, or start/end of
 // main()).
 //
 // TODO(deadbeef): Instead of having functions that access this global
 // ClockInterface, we may want to pass the ClockInterface into everything
 // that uses it, eliminating the need for a global variable and this function.
 ClockInterface* SetClockForTesting(ClockInterface* clock);
 
+// Returns previously set clock, or nullptr if no custom clock is being used.
+ClockInterface* GetClockForTesting();
+
 // Returns the actual system time, even if a clock is set for testing.
 // Useful for timeouts while using a test clock, or for logging.
 int64_t SystemTimeNanos();
 int64_t SystemTimeMillis();
 
 // Returns the current time in milliseconds in 32 bits.
 uint32_t Time32();
 
 // Returns the current time in milliseconds in 64 bits.
 int64_t TimeMillis();
@@ skipping 51 matching lines @@
 // Note that this function obeys the system's idea about what the time
 // is. It is not guaranteed to be monotonic; it will jump in case the
 // system time is changed, e.g., by some other process calling
 // settimeofday. Always use rtc::TimeMicros(), not this function, for
 // measuring time intervals and timeouts.
 int64_t TimeUTCMicros();
 
 }  // namespace rtc
 
 #endif  // WEBRTC_BASE_TIMEUTILS_H_