Introduce dchecked_cast, and start using it

webrtc/modules/audio_coding/acm2/audio_coding_module.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.
  */
 
@@ skipping 352 matching lines @@
   }
 
   frag->VerifyAndAllocateFragmentationHeader(
       static_cast<uint16_t>(info.redundant.size()));
   frag->fragmentationVectorSize = static_cast<uint16_t>(info.redundant.size());
   size_t offset = 0;
   for (size_t i = 0; i < info.redundant.size(); ++i) {
     frag->fragmentationOffset[i] = offset;
     offset += info.redundant[i].encoded_bytes;
     frag->fragmentationLength[i] = info.redundant[i].encoded_bytes;
-    frag->fragmentationTimeDiff[i] = rtc::checked_cast<uint16_t>(
+    frag->fragmentationTimeDiff[i] = rtc::dchecked_cast<uint16_t>(
         info.encoded_timestamp - info.redundant[i].encoded_timestamp);
     frag->fragmentationPlType[i] = info.redundant[i].payload_type;
   }
 }
 
 // Wraps a raw AudioEncoder pointer. The idea is that you can put one of these
 // in a unique_ptr, to protect the contained raw pointer from being deleted
 // when the unique_ptr expires. (This is of course a bad idea in general, but
 // backwards compatibility.)
 class RawAudioEncoderWrapper final : public AudioEncoder {
@@ skipping 992 matching lines @@
 // Checks the validity of the parameters of the given codec
 bool AudioCodingModule::IsCodecValid(const CodecInst& codec) {
   bool valid = acm2::RentACodec::IsCodecValid(codec);
   if (!valid)
     WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, -1,
                  "Invalid codec setting");
   return valid;
 }
 
 }  // namespace webrtc