Strip out stream counting from AudioRendererHost.

media/audio/audio_streams_tracker.cc

Index: media/audio/audio_streams_tracker.cc
diff --git a/media/audio/audio_streams_tracker.cc b/media/audio/audio_streams_tracker.cc
index 5363796df737f3667923479b192ddc709730c1a5..8c41fbe29c69557640377ba0bd3fc47cf15a0cbc 100644
--- a/media/audio/audio_streams_tracker.cc
+++ b/media/audio/audio_streams_tracker.cc
@@ -25,10 +25,10 @@ void AudioStreamsTracker::IncreaseStreamCount() {
     max_stream_count_ = current_stream_count_;
 }
 
-void AudioStreamsTracker::DecreaseStreamCount(size_t count) {
+void AudioStreamsTracker::DecreaseStreamCount() {
   DCHECK(thread_checker_.CalledOnValidThread());
-  DCHECK_GE(current_stream_count_, count);
-  current_stream_count_ -= count;
+  DCHECK_GE(current_stream_count_, 1u);
+  --current_stream_count_;
 }
 
 void AudioStreamsTracker::ResetMaxStreamCount() {
@@ -36,9 +36,4 @@ void AudioStreamsTracker::ResetMaxStreamCount() {
   max_stream_count_ = current_stream_count_;
 }
 
-size_t AudioStreamsTracker::max_stream_count() const {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  return max_stream_count_;
-}
-
 }  // namespace media