system_wrappers: rename interface -> include

webrtc/system_wrappers/source/clock_unittest.cc

 /*
  *  Copyright (c) 2012 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.
  */
 
-#include "webrtc/system_wrappers/interface/clock.h"
+#include "webrtc/system_wrappers/include/clock.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace webrtc {
 
 TEST(ClockTest, NtpTime) {
   Clock* clock = Clock::GetRealTimeClock();
   uint32_t seconds;
   uint32_t fractions;
   clock->CurrentNtp(seconds, fractions);
   int64_t milliseconds = clock->CurrentNtpInMilliseconds();
   EXPECT_GT(milliseconds / 1000, kNtpJan1970);
   EXPECT_GE(milliseconds, Clock::NtpToMs(seconds, fractions));
   EXPECT_NEAR(milliseconds, Clock::NtpToMs(seconds, fractions), 100);
 }
 
 }  // namespace webrtc