Strip out stream counting from AudioRendererHost.

media/audio/audio_streams_tracker.cc

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "media/audio/audio_streams_tracker.h"
-
-#include <limits>
-
-namespace media {
-
-AudioStreamsTracker::AudioStreamsTracker()
-    : current_stream_count_(0), max_stream_count_(0) {
-  thread_checker_.DetachFromThread();
-}
-
-AudioStreamsTracker::~AudioStreamsTracker() {
-  DCHECK_EQ(current_stream_count_, 0u);
-}
-
-void AudioStreamsTracker::IncreaseStreamCount() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  DCHECK_NE(current_stream_count_, std::numeric_limits<size_t>::max());
-  ++current_stream_count_;
-  if (current_stream_count_ > max_stream_count_)
-    max_stream_count_ = current_stream_count_;
-}
-
-void AudioStreamsTracker::DecreaseStreamCount(size_t count) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  DCHECK_GE(current_stream_count_, count);
-  current_stream_count_ -= count;
-}
-
-void AudioStreamsTracker::ResetMaxStreamCount() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  max_stream_count_ = current_stream_count_;
-}
-
-size_t AudioStreamsTracker::max_stream_count() const {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  return max_stream_count_;
-}
-
-}  // namespace media