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

webrtc/common_audio/channel_buffer.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 76 matching lines @@
 
   // Returns a pointer array to the bands for a specific channel.
   // Usage:
   // bands(channel)[band][sample].
   // Where:
   // 0 <= channel < |num_channels_|
   // 0 <= band < |num_bands_|
   // 0 <= sample < |num_frames_per_band_|
   const T* const* bands(size_t channel) const {
     RTC_DCHECK_LT(channel, num_channels_);
-    RTC_DCHECK_GE(channel, 0u);
+    RTC_DCHECK_GE(channel, 0);
     return &bands_[channel * num_bands_];
   }
   T* const* bands(size_t channel) {
     const ChannelBuffer<T>* t = this;
     return const_cast<T* const*>(t->bands(channel));
   }
 
   // Sets the |slice| pointers to the |start_frame| position for each channel.
   // Returns |slice| for convenience.
   const T* const* Slice(T** slice, size_t start_frame) const {
@@ skipping 69 matching lines @@
 
   mutable bool ivalid_;
   mutable ChannelBuffer<int16_t> ibuf_;
   mutable bool fvalid_;
   mutable ChannelBuffer<float> fbuf_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_CHANNEL_BUFFER_H_