Refactor rtc_unittests into several targets.

webrtc/base/timeutils_unittest.cc

 /*
  *  Copyright 2004 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 100 matching lines @@
   EXPECT_EQ(ts,
             wraparound_handler_.Unwrap(static_cast<uint32_t>(ts & 0xffffffff)));
 }
 
 class TmToSeconds : public testing::Test {
  public:
   TmToSeconds() {
     // Set use of the test RNG to get deterministic expiration timestamp.
     rtc::SetRandomTestMode(true);
   }
-  ~TmToSeconds() {
+  ~TmToSeconds() override {
     // Put it back for the next test.
     rtc::SetRandomTestMode(false);
   }
 
   void TestTmToSeconds(int times) {
     static char mdays[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
     for (int i = 0; i < times; i++) {
 
       // First generate something correct and check that TmToSeconds is happy.
       int year = rtc::CreateRandomId() % 400 + 1970;
@@ skipping 242 matching lines @@
 
   SetClockForTesting(nullptr);
 
   // The message should have been dispatched long before the 60 seconds fully
   // elapsed (just a sanity check).
   int64_t real_end_time_ms = TimeMillis();
   EXPECT_LT(real_end_time_ms - real_start_time_ms, 10000);
 }
 
 }  // namespace rtc