Revert of New statistics interface for APM

webrtc/modules/audio_processing/audio_processing_impl.cc

Index: webrtc/modules/audio_processing/audio_processing_impl.cc
diff --git a/webrtc/modules/audio_processing/audio_processing_impl.cc b/webrtc/modules/audio_processing/audio_processing_impl.cc
index 189d7095e0c89225eb13333fe3b569bce62baaeb..12b4c949046f08ddcc3f974d26024bea7e516b54 100644
--- a/webrtc/modules/audio_processing/audio_processing_impl.cc
+++ b/webrtc/modules/audio_processing/audio_processing_impl.cc
@@ -443,10 +443,6 @@
       num_proc_channels());
   AllocateRenderQueue();
 
-  int success = public_submodules_->echo_cancellation->enable_metrics(true);
-  RTC_DCHECK_EQ(0, success);
-  success = public_submodules_->echo_cancellation->enable_delay_logging(true);
-  RTC_DCHECK_EQ(0, success);
   public_submodules_->echo_control_mobile->Initialize(
       proc_split_sample_rate_hz(), num_reverse_channels(),
       num_output_channels());
@@ -1419,22 +1415,6 @@
 #else
   return kUnsupportedFunctionError;
 #endif  // WEBRTC_AUDIOPROC_DEBUG_DUMP
-}
-
-AudioProcessing::AudioProcessingStatistics AudioProcessingImpl::GetStatistics()
-    const {
-  AudioProcessingStatistics stats;
-  EchoCancellation::Metrics metrics;
-  public_submodules_->echo_cancellation->GetMetrics(&metrics);
-  stats.a_nlp.Set(metrics.a_nlp);
-  stats.divergent_filter_fraction = metrics.divergent_filter_fraction;
-  stats.echo_return_loss.Set(metrics.echo_return_loss);
-  stats.echo_return_loss_enhancement.Set(metrics.echo_return_loss_enhancement);
-  stats.residual_echo_return_loss.Set(metrics.residual_echo_return_loss);
-  public_submodules_->echo_cancellation->GetDelayMetrics(
-      &stats.delay_median, &stats.delay_standard_deviation,
-      &stats.fraction_poor_delays);
-  return stats;
 }
 
 EchoCancellation* AudioProcessingImpl::echo_cancellation() const {