Remove various IDs

modules/audio_mixer/frame_combiner.cc

Index: modules/audio_mixer/frame_combiner.cc
diff --git a/modules/audio_mixer/frame_combiner.cc b/modules/audio_mixer/frame_combiner.cc
index 9e9bcfafb0db7f1cf0f8df2992b58312519f0708..80009045292e997d2a9e15c8691fce08a9176d89 100644
--- a/modules/audio_mixer/frame_combiner.cc
+++ b/modules/audio_mixer/frame_combiner.cc
@@ -193,7 +193,7 @@ void FrameCombiner::Combine(const std::vector<AudioFrame*>& mix_list,
   // value '0', because it is only supported in the one channel case and
   // is then updated in the helper functions.
   audio_frame_for_mixing->UpdateFrame(
-      -1, 0, nullptr, samples_per_channel, sample_rate, AudioFrame::kUndefined,
+      0, nullptr, samples_per_channel, sample_rate, AudioFrame::kUndefined,
       AudioFrame::kVadUnknown, number_of_channels);
 
   const bool use_limiter_this_round = use_apm_limiter_ && number_of_streams > 1;