1 files changed, 2 insertions, 40 deletions
diff --git a/chromium/media/base/audio_renderer_mixer.cc b/chromium/media/base/audio_renderer_mixer.cc
index d3c1bd8c7db..d7109300027 100644
--- a/chromium/media/base/audio_renderer_mixer.cc
+++ b/chromium/media/base/audio_renderer_mixer.cc
@@ -24,49 +24,15 @@ namespace media {
 
 enum { kPauseDelaySeconds = 10 };
 
-// Tracks the maximum value of a counter and logs it into a UMA histogram upon
-// each increase of the maximum. NOT thread-safe, make sure it is used under
-// lock.
-class AudioRendererMixer::UMAMaxValueTracker {
- public:
-  UMAMaxValueTracker(UmaLogCallback log_callback)
-      : log_callback_(std::move(log_callback)), count_(0), max_count_(0) {}
-
-  ~UMAMaxValueTracker() = default;
-
-  // Increments the counter, updates the maximum.
-  void Increment() {
-    ++count_;
-    if (max_count_ < count_) {
-      max_count_ = count_;
-      log_callback_.Run(max_count_);
-    }
-  }
-
-  // Decrements the counter.
-  void Decrement() {
-    DCHECK_GE(count_, 0);
-    --count_;
-  }
-
- private:
-  const UmaLogCallback log_callback_;
-  int count_;
-  int max_count_;
-  DISALLOW_COPY_AND_ASSIGN(UMAMaxValueTracker);
-};
-
 AudioRendererMixer::AudioRendererMixer(const AudioParameters& output_params,
-                                       scoped_refptr<AudioRendererSink> sink,
-                                       UmaLogCallback log_callback)
+                                       scoped_refptr<AudioRendererSink> sink)
     : output_params_(output_params),
       audio_sink_(std::move(sink)),
       master_converter_(output_params, output_params, true),
       pause_delay_(base::TimeDelta::FromSeconds(kPauseDelaySeconds)),
       last_play_time_(base::TimeTicks::Now()),
       // Initialize |playing_| to true since Start() results in an auto-play.
-      playing_(true),
-      input_count_tracker_(new UMAMaxValueTracker(std::move(log_callback))) {
+      playing_(true) {
   DCHECK(audio_sink_);
 
   // If enabled we will disable the real audio output stream for muted/silent
@@ -126,8 +92,6 @@ void AudioRendererMixer::AddMixerInput(const AudioParameters& input_params,
     }
     converter->second->AddInput(input);
   }
-
-  input_count_tracker_->Increment();
 }
 
 void AudioRendererMixer::RemoveMixerInput(
@@ -148,8 +112,6 @@ void AudioRendererMixer::RemoveMixerInput(
       converters_.erase(converter);
     }
   }
-
-  input_count_tracker_->Decrement();
 }
 
 void AudioRendererMixer::AddErrorCallback(AudioRendererMixerInput* input) {