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

webrtc/modules/audio_coding/neteq/test/neteq_pcmu_quality_test.cc

 /*
  *  Copyright (c) 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 <memory>
 
 #include "webrtc/base/checks.h"
-#include "webrtc/base/numerics/safe_conversions.h"
+#include "webrtc/base/safe_conversions.h"
 #include "webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.h"
 #include "webrtc/modules/audio_coding/neteq/tools/neteq_quality_test.h"
 #include "webrtc/test/testsupport/fileutils.h"
 
 using google::RegisterFlagValidator;
 using google::ParseCommandLineFlags;
 using std::string;
 using testing::InitGoogleTest;
 
 namespace webrtc {
@@ skipping 53 matching lines @@
  private:
   std::unique_ptr<AudioEncoderPcmU> encoder_;
 };
 
 TEST_F(NetEqPcmuQualityTest, Test) {
   Simulate();
 }
 
 }  // namespace test
 }  // namespace webrtc