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

webrtc/modules/audio_mixer/audio_frame_manipulator.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 13 matching lines @@
   }
   return energy;
 }
 
 void Ramp(float start_gain, float target_gain, AudioFrame* audio_frame) {
   RTC_DCHECK(audio_frame);
   RTC_DCHECK_GE(start_gain, 0.0f);
   RTC_DCHECK_GE(target_gain, 0.0f);
 
   size_t samples = audio_frame->samples_per_channel_;
-  RTC_DCHECK_LT(0u, samples);
+  RTC_DCHECK_LT(0, samples);
   float increment = (target_gain - start_gain) / samples;
   float gain = start_gain;
   for (size_t i = 0; i < samples; ++i) {
     // If the audio is interleaved of several channels, we want to
     // apply the same gain change to the ith sample of every channel.
     for (size_t ch = 0; ch < audio_frame->num_channels_; ++ch) {
       audio_frame->data_[audio_frame->num_channels_ * i + ch] *= gain;
     }
     gain += increment;
   }
 }
 
 void RemixFrame(size_t target_number_of_channels, AudioFrame* frame) {
-  RTC_DCHECK_GE(target_number_of_channels, 1u);
-  RTC_DCHECK_LE(target_number_of_channels, 2u);
+  RTC_DCHECK_GE(target_number_of_channels, 1);
+  RTC_DCHECK_LE(target_number_of_channels, 2);
   if (frame->num_channels_ == 1 && target_number_of_channels == 2) {
     AudioFrameOperations::MonoToStereo(frame);
   } else if (frame->num_channels_ == 2 && target_number_of_channels == 1) {
     AudioFrameOperations::StereoToMono(frame);
   }
 }
 }  // namespace webrtc