Add channel_count parameter back to AudioBuffer creation methods.

media/base/audio_buffer_queue_unittest.cc

Index: media/base/audio_buffer_queue_unittest.cc
diff --git a/media/base/audio_buffer_queue_unittest.cc b/media/base/audio_buffer_queue_unittest.cc
index adbac75d5b8325fa05ef8838d1cc5ea388e7e701..fc048573e10a3d50bd4749f52858cc24407f0c18 100644
--- a/media/base/audio_buffer_queue_unittest.cc
+++ b/media/base/audio_buffer_queue_unittest.cc
@@ -39,6 +39,7 @@ static scoped_refptr<AudioBuffer> MakeTestBuffer(SampleFormat format,
   const base::TimeDelta kNoTime = kNoTimestamp();
   return MakeAudioBuffer<T>(format,
                             channel_layout,
+                            ChannelLayoutToChannelCount(channel_layout),
                             kSampleRate,
                             start,
                             end,
@@ -388,6 +389,7 @@ TEST(AudioBufferQueueTest, Time) {
   //   second: start=30s, duration=10s
   buffer.Append(MakeAudioBuffer<int16>(kSampleFormatS16,
                                        channel_layout,
+                                       channels,
                                        kSampleRate,
                                        1,
                                        1,
@@ -412,6 +414,7 @@ TEST(AudioBufferQueueTest, Time) {
   // Add second buffer for more data.
   buffer.Append(MakeAudioBuffer<int16>(kSampleFormatS16,
                                        channel_layout,
+                                       channels,
                                        kSampleRate,
                                        1,
                                        1,