RTC_[D]CHECK_op: Remove superfluous casts

webrtc/test/rtcp_packet_parser.h

 /*
  *  Copyright (c) 2014 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 23 matching lines @@
 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/transport_feedback.h"
 
 namespace webrtc {
 namespace test {
 // Parse RTCP packet of given type. Assumes RTCP header is valid and that there
 // is excatly one packet of correct type in the buffer.
 template <typename Packet>
 bool ParseSinglePacket(const uint8_t* buffer, size_t size, Packet* packet) {
   rtcp::CommonHeader header;
   RTC_CHECK(header.Parse(buffer, size));
-  RTC_CHECK_EQ(static_cast<ptrdiff_t>(size), header.NextPacket() - buffer);
+  RTC_CHECK_EQ(size, header.NextPacket() - buffer);
   return packet->Parse(header);
 }
 // Same function, but takes raw buffer as single argument instead of pair.
 template <typename Packet>
 bool ParseSinglePacket(rtc::ArrayView<const uint8_t> buffer, Packet* packet) {
   return ParseSinglePacket(buffer.data(), buffer.size(), packet);
 }
 
 class RtcpPacketParser {
  public:
@@ skipping 63 matching lines @@
   PacketCounter<rtcp::Sli> sli_;
   PacketCounter<rtcp::Tmmbn> tmmbn_;
   PacketCounter<rtcp::Tmmbr> tmmbr_;
   PacketCounter<rtcp::TransportFeedback> transport_feedback_;
   uint32_t sender_ssrc_ = 0;
 };
 
 }  // namespace test
 }  // namespace webrtc
 #endif  // WEBRTC_TEST_RTCP_PACKET_PARSER_H_