RTC_[D]CHECK_op: Remove superfluous casts

webrtc/test/layer_filtering_transport.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.
  */
 
@@ skipping 33 matching lines @@
   if (selected_tl_ == -1 && selected_sl_ == -1) {
     // Nothing to change, forward the packet immediately.
     return test::DirectTransport::SendRtp(packet, length, options);
   }
 
   bool set_marker_bit = false;
   RtpUtility::RtpHeaderParser parser(packet, length);
   RTPHeader header;
   parser.Parse(&header);
 
-  RTC_DCHECK_LE(length, static_cast<size_t>(IP_PACKET_SIZE));
+  RTC_DCHECK_LE(length, IP_PACKET_SIZE);
   uint8_t temp_buffer[IP_PACKET_SIZE];
   memcpy(temp_buffer, packet, length);
 
   if (header.payloadType == vp8_video_payload_type_ ||
       header.payloadType == vp9_video_payload_type_) {
     const uint8_t* payload = packet + header.headerLength;
     RTC_DCHECK_GT(length, header.headerLength);
     const size_t payload_length = length - header.headerLength;
     RTC_DCHECK_GT(payload_length, header.paddingLength);
     const size_t payload_data_length = payload_length - header.paddingLength;
@@ skipping 33 matching lines @@
   // make sure the marker bit is set properly, and that sequence numbers are
   // continuous.
   if (set_marker_bit)
     temp_buffer[1] |= kRtpMarkerBitMask;
 
   return test::DirectTransport::SendRtp(temp_buffer, length, options);
 }
 
 }  // namespace test
 }  // namespace webrtc