RTC_[D]CHECK_op: Remove superfluous casts

webrtc/modules/video_coding/video_codec_initializer.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 146 matching lines @@
   }
 
   strncpy(video_codec.plName, payload_name.c_str(), kPayloadNameSize - 1);
   video_codec.plName[kPayloadNameSize - 1] = '\0';
   video_codec.plType = payload_type;
   video_codec.numberOfSimulcastStreams =
       static_cast<unsigned char>(streams.size());
   video_codec.minBitrate = streams[0].min_bitrate_bps / 1000;
   if (video_codec.minBitrate < kEncoderMinBitrateKbps)
     video_codec.minBitrate = kEncoderMinBitrateKbps;
-  RTC_DCHECK_LE(streams.size(), static_cast<size_t>(kMaxSimulcastStreams));
+  RTC_DCHECK_LE(streams.size(), kMaxSimulcastStreams);
   if (video_codec.codecType == kVideoCodecVP9) {
     // If the vector is empty, bitrates will be configured automatically.
     RTC_DCHECK(config.spatial_layers.empty() ||
                config.spatial_layers.size() ==
                    video_codec.VP9()->numberOfSpatialLayers);
     RTC_DCHECK_LE(video_codec.VP9()->numberOfSpatialLayers,
                   kMaxSimulcastStreams);
     for (size_t i = 0; i < config.spatial_layers.size(); ++i)
       video_codec.spatialLayers[i] = config.spatial_layers[i];
   }
@@ skipping 38 matching lines @@
   }
   if (video_codec.maxBitrate < kEncoderMinBitrateKbps)
     video_codec.maxBitrate = kEncoderMinBitrateKbps;
 
   RTC_DCHECK_GT(streams[0].max_framerate, 0);
   video_codec.maxFramerate = streams[0].max_framerate;
   return video_codec;
 }
 
 }  // namespace webrtc