Introduce dchecked_cast, and start using it

webrtc/modules/audio_coding/neteq/tools/encode_neteq_input.cc

 /*
  *  Copyright (c) 2016 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 54 matching lines @@
   AudioEncoder::EncodedInfo info;
   RTC_DCHECK(!info.send_even_if_empty);
   int num_blocks = 0;
   while (packet_data_->payload.size() == 0 && !info.send_even_if_empty) {
     const size_t num_samples = rtc::CheckedDivExact(
         static_cast<int>(encoder_->SampleRateHz() * kOutputPeriodMs), 1000);
 
     info = encoder_->Encode(rtp_timestamp_, generator_->Generate(num_samples),
                             &packet_data_->payload);
 
-    rtp_timestamp_ += rtc::checked_cast<uint32_t>(
+    rtp_timestamp_ += rtc::dchecked_cast<uint32_t>(
         num_samples * encoder_->RtpTimestampRateHz() /
         encoder_->SampleRateHz());
     ++num_blocks;
   }
   packet_data_->header.header.timestamp = info.encoded_timestamp;
   packet_data_->header.header.payloadType = info.payload_type;
   packet_data_->header.header.sequenceNumber = sequence_number_++;
   packet_data_->time_ms = next_packet_time_ms_;
   next_packet_time_ms_ += num_blocks * kOutputPeriodMs;
 }
 
 }  // namespace test
 }  // namespace webrtc