RTC_[D]CHECK_op: Remove superfluous casts

webrtc/modules/rtp_rtcp/source/forward_error_correction.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 87 matching lines @@
                                       uint8_t protection_factor,
                                       int num_important_packets,
                                       bool use_unequal_protection,
                                       FecMaskType fec_mask_type,
                                       std::list<Packet*>* fec_packets) {
   const size_t num_media_packets = media_packets.size();
 
   // Sanity check arguments.
   RTC_DCHECK_GT(num_media_packets, 0);
   RTC_DCHECK_GE(num_important_packets, 0);
-  RTC_DCHECK_LE(static_cast<size_t>(num_important_packets), num_media_packets);
+  RTC_DCHECK_LE(num_important_packets, num_media_packets);
   RTC_DCHECK(fec_packets->empty());
   const size_t max_media_packets = fec_header_writer_->MaxMediaPackets();
   if (num_media_packets > max_media_packets) {
     LOG(LS_WARNING) << "Can't protect " << num_media_packets
                     << " media packets per frame. Max is " << max_media_packets
                     << ".";
     return -1;
   }
 
   // Error check the media packets.
@@ skipping 617 matching lines @@
 
 size_t FecHeaderWriter::MaxFecPackets() const {
   return max_fec_packets_;
 }
 
 size_t FecHeaderWriter::MaxPacketOverhead() const {
   return max_packet_overhead_;
 }
 
 }  // namespace webrtc