Clean up the media stream audio track code

content/renderer/media/media_stream_audio_processor_options.cc

 // Copyright 2013 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 "content/renderer/media/media_stream_audio_processor_options.h"
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
@@ skipping 122 matching lines @@
   if ((GetConstraintValueAsString(constraints, kMediaStreamSource,
                                   &value_str)) ||
       (GetConstraintValueAsBoolean(constraints_, kEchoCancellation,
                                    &value_bool) && !value_bool)) {
     default_audio_processing_constraint_value_ = false;
   }
 }
 
 MediaAudioConstraints::~MediaAudioConstraints() {}
 
-// TODO(xians): Remove this method after the APM in WebRtc is deprecated.
-bool MediaAudioConstraints::NeedsAudioProcessing() {
-  if (GetEchoCancellationProperty())
-    return true;
-
-  for (size_t i = 0; i < arraysize(kDefaultAudioConstraints); ++i) {
-    // |kEchoCancellation| and |kGoogEchoCancellation| have been convered by
-    // GetEchoCancellationProperty().
-    if (kDefaultAudioConstraints[i].key != kEchoCancellation &&
-        kDefaultAudioConstraints[i].key != kGoogEchoCancellation &&
-        IsAudioProcessingConstraint(kDefaultAudioConstraints[i].key) &&
-        GetProperty(kDefaultAudioConstraints[i].key)) {
-      return true;
-    }
-  }
-
-  return false;
-}
-
 bool MediaAudioConstraints::GetProperty(const std::string& key) {
   // Return the value if the constraint is specified in |constraints|,
   // otherwise return the default value.
   bool value = false;
   if (!GetConstraintValueAsBoolean(constraints_, key, &value))
     value = GetDefaultValueForConstraint(constraints_, key);
 
   return value;
 }
 
@@ skipping 214 matching lines @@
   }
 
   int median = 0, std = 0;
   if (!audio_processing->echo_cancellation()->GetDelayMetrics(&median, &std)) {
     stats->echo_delay_median_ms = median;
     stats->echo_delay_std_ms = std;
   }
 }
 
 }  // namespace content