Adds Media.Audio.InputStartWasDeferredAudioWorkedMac UMA stat

media/audio/mac/audio_low_latency_input_mac.cc

 // Copyright (c) 2012 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/mac/audio_low_latency_input_mac.h"
 #include <CoreServices/CoreServices.h>
 #include <mach/mach.h>
 #include <string>
 
 #include "base/logging.h"
@@ skipping 542 matching lines @@
   CloseAudioUnit();
   // Disable the listener for device property changes.
   DeRegisterDeviceChangeListener();
   // Add more UMA stats but only if AGC was activated, i.e. for e.g. WebRTC
   // audio input streams.
   if (GetAutomaticGainControl()) {
     // Check if any device property changes are added by filtering out a
     // selected set of the |device_property_changes_map_| map. Add UMA stats
     // if valuable data is found.
     AddDevicePropertyChangesToUMA(false);
+    // Log whether call to Start() was deferred or not. To be compared with
+    // Media.Audio.InputStartWasDeferredMac which logs the same value but only
+    // when input audio fails to start.
+    UMA_HISTOGRAM_BOOLEAN("Media.Audio.InputStartWasDeferredAudioWorkedMac",
+                          start_was_deferred_);
+    // Log if a change of I/O buffer size was required. To be compared with
+    // Media.Audio.InputBufferSizeWasChangedMac which logs the same value but
+    // only when input audio fails to start.
+    UMA_HISTOGRAM_BOOLEAN("Media.Audio.InputBufferSizeWasChangedAudioWorkedMac",
+                          buffer_size_was_changed_);
     // TODO(henrika): possibly add more values here...
   }
   // Inform the audio manager that we have been closed. This will cause our
   // destruction.
   manager_->ReleaseInputStream(this);
 }
 
 double AUAudioInputStream::GetMaxVolume() {
   // Verify that we have a valid device.
   if (input_device_id_ == kAudioObjectUnknown) {
@@ skipping 745 matching lines @@
 
   number_of_frames_provided_ = 0;
   glitches_detected_ = 0;
   last_sample_time_ = 0;
   last_number_of_frames_ = 0;
   total_lost_frames_ = 0;
   largest_glitch_frames_ = 0;
 }
 
 }  // namespace media