Add mute state field to AudioFrame.

webrtc/modules/audio_coding/neteq/sync_buffer.cc

Index: webrtc/modules/audio_coding/neteq/sync_buffer.cc
diff --git a/webrtc/modules/audio_coding/neteq/sync_buffer.cc b/webrtc/modules/audio_coding/neteq/sync_buffer.cc
index f841f754a8568bdd2dcd349d3619048b4d0ca964..9285bbc093c5a8e58e26015eb265de8945f9eae3 100644
--- a/webrtc/modules/audio_coding/neteq/sync_buffer.cc
+++ b/webrtc/modules/audio_coding/neteq/sync_buffer.cc
@@ -76,7 +76,8 @@ void SyncBuffer::GetNextAudioInterleaved(size_t requested_len,
   const size_t samples_to_read = std::min(FutureLength(), requested_len);
   output->Reset();
   const size_t tot_samples_read =
-      ReadInterleavedFromIndex(next_index_, samples_to_read, output->data_);
+      ReadInterleavedFromIndex(next_index_, samples_to_read,
+                               output->mutable_data());
   const size_t samples_read_per_channel = tot_samples_read / Channels();
   next_index_ += samples_read_per_channel;
   output->num_channels_ = Channels();