RTC_[D]CHECK_op: Remove "u" suffix on integer constants

webrtc/modules/audio_coding/codecs/opus/audio_encoder_opus.cc

 /*
  *  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 434 matching lines @@
   num_channels_to_encode_ = NumChannels();
   next_frame_length_ms_ = config_.frame_size_ms;
   return true;
 }
 
 void AudioEncoderOpus::SetFrameLength(int frame_length_ms) {
   next_frame_length_ms_ = frame_length_ms;
 }
 
 void AudioEncoderOpus::SetNumChannelsToEncode(size_t num_channels_to_encode) {
-  RTC_DCHECK_GT(num_channels_to_encode, 0u);
+  RTC_DCHECK_GT(num_channels_to_encode, 0);
   RTC_DCHECK_LE(num_channels_to_encode, config_.num_channels);
 
   if (num_channels_to_encode_ == num_channels_to_encode)
     return;
 
   RTC_CHECK_EQ(0, WebRtcOpus_SetForceChannels(inst_, num_channels_to_encode));
   num_channels_to_encode_ = num_channels_to_encode;
 }
 
 void AudioEncoderOpus::ApplyAudioNetworkAdaptor() {
@@ skipping 24 matching lines @@
   AudioNetworkAdaptorImpl::Config config;
   config.clock = clock;
   return std::unique_ptr<AudioNetworkAdaptor>(new AudioNetworkAdaptorImpl(
       config, ControllerManagerImpl::Create(
                   config_string, NumChannels(), supported_frame_lengths_ms(),
                   num_channels_to_encode_, next_frame_length_ms_,
                   GetTargetBitrate(), config_.fec_enabled, GetDtx(), clock)));
 }
 
 }  // namespace webrtc