Style changes in Audio Mixer

webrtc/modules/audio_mixer/test/audio_mixer_unittest.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.
  */
 
 #include <string.h>
 
 #include <memory>
 #include <utility>
 
 #include "testing/gmock/include/gmock/gmock.h"
+#include "webrtc/modules/audio_mixer/audio_mixer.h"
 #include "webrtc/modules/audio_mixer/audio_mixer_defines.h"
-#include "webrtc/modules/audio_mixer/audio_mixer.h"
 
 using testing::_;
 using testing::Exactly;
 using testing::Invoke;
 using testing::Return;
 
 namespace webrtc {
 
 namespace {
 
@@ skipping 249 matching lines @@
   }
 }
 
 TEST(AudioMixer, ParticipantNumberOfChannels) {
   const std::unique_ptr<AudioMixer> mixer(AudioMixer::Create(kId));
 
   MockMixerAudioSource participant;
   ResetFrame(participant.fake_frame());
 
   EXPECT_EQ(0, mixer->SetMixabilityStatus(&participant, true));
-  for (size_t number_of_channels : {1, 2}) {
+  for (int number_of_channels : {1, 2}) {
     EXPECT_CALL(participant, GetAudioFrameWithMuted(_, kDefaultSampleRateHz))
         .Times(Exactly(1));
     mixer->Mix(kDefaultSampleRateHz, number_of_channels, &frame_for_mixing);
-    EXPECT_EQ(number_of_channels, frame_for_mixing.num_channels_);
+    EXPECT_EQ(static_cast<size_t>(number_of_channels),
+              frame_for_mixing.num_channels_);
   }
 }
 
 // Test that the volume is reported as zero when the mixer input
 // comprises only zero values.
 TEST(AudioMixer, LevelIsZeroWhenMixingZeroes) {
   const std::unique_ptr<AudioMixer> mixer(AudioMixer::Create(kId));
 
   MockMixerAudioSource participant;
   ResetFrame(participant.fake_frame());
@@ skipping 164 matching lines @@
       kAudioSources, MixerAudioSource::AudioFrameInfo::kNormal);
   frame_info[0] = MixerAudioSource::AudioFrameInfo::kMuted;
   std::fill(frames[0].data_, frames[0].data_ + kDefaultSampleRateHz / 100,
             std::numeric_limits<int16_t>::max());
   std::vector<bool> expected_status(kAudioSources, true);
   expected_status[0] = false;
 
   MixAndCompare(frames, frame_info, expected_status);
 }
 }  // namespace webrtc