Revert of Safe numeric library: base/numerics (copied from Chromium)

webrtc/base/rtccertificate_unittests.cc

 /*
  *  Copyright 2015 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 <utility>
 
 #include "webrtc/base/checks.h"
 #include "webrtc/base/fakesslidentity.h"
 #include "webrtc/base/gunit.h"
 #include "webrtc/base/logging.h"
-#include "webrtc/base/numerics/safe_conversions.h"
 #include "webrtc/base/rtccertificate.h"
+#include "webrtc/base/safe_conversions.h"
 #include "webrtc/base/scoped_ptr.h"
 #include "webrtc/base/sslidentity.h"
 #include "webrtc/base/thread.h"
 #include "webrtc/base/timeutils.h"
 
 namespace rtc {
 
 namespace {
 
 static const char* kTestCertCommonName = "RTCCertificateTest's certificate";
@@ skipping 80 matching lines @@
   uint64_t now = NowSeconds();
   scoped_refptr<RTCCertificate> certificate =
       GenerateCertificateWithExpires(now + 1);
   // Now it should not have expired.
   EXPECT_FALSE(HasExpiredSeconds(certificate, now));
   // In 2s it should have expired.
   EXPECT_TRUE(HasExpiredSeconds(certificate, now + 2));
 }
 
 }  // namespace rtc