Improvements in how WebRTC.Audio.RecordedOnlyZeros is added as histogram

webrtc/modules/audio_device/audio_device_impl.cc

Index: webrtc/modules/audio_device/audio_device_impl.cc
diff --git a/webrtc/modules/audio_device/audio_device_impl.cc b/webrtc/modules/audio_device/audio_device_impl.cc
index cf69275eebd5634fc8136937aaba64e1838aa8eb..18eeb9004886cb94e7974f964d756b0292a25db9 100644
--- a/webrtc/modules/audio_device/audio_device_impl.cc
+++ b/webrtc/modules/audio_device/audio_device_impl.cc
@@ -1402,6 +1402,7 @@ int32_t AudioDeviceModuleImpl::StartPlayout() {
   if (Playing()) {
     return 0;
   }
+  _audioDeviceBuffer.StartPlayout();
   int32_t result = _ptrAudioDevice->StartPlayout();
   LOG(INFO) << "output: " << result;
   RTC_HISTOGRAM_BOOLEAN("WebRTC.Audio.StartPlayoutSuccess",
@@ -1417,6 +1418,7 @@ int32_t AudioDeviceModuleImpl::StopPlayout() {
   LOG(INFO) << __FUNCTION__;
   CHECK_INITIALIZED();
   int32_t result = _ptrAudioDevice->StopPlayout();
+  _audioDeviceBuffer.StopPlayout();
   LOG(INFO) << "output: " << result;
   RTC_HISTOGRAM_BOOLEAN("WebRTC.Audio.StopPlayoutSuccess",
                         static_cast<int>(result == 0));
@@ -1443,6 +1445,7 @@ int32_t AudioDeviceModuleImpl::StartRecording() {
   if (Recording()) {
     return 0;
   }
+  _audioDeviceBuffer.StartRecording();
   int32_t result = _ptrAudioDevice->StartRecording();
   LOG(INFO) << "output: " << result;
   RTC_HISTOGRAM_BOOLEAN("WebRTC.Audio.StartRecordingSuccess",
@@ -1457,6 +1460,7 @@ int32_t AudioDeviceModuleImpl::StopRecording() {
   LOG(INFO) << __FUNCTION__;
   CHECK_INITIALIZED();
   int32_t result = _ptrAudioDevice->StopRecording();
+  _audioDeviceBuffer.StopRecording();
   LOG(INFO) << "output: " << result;
   RTC_HISTOGRAM_BOOLEAN("WebRTC.Audio.StopRecordingSuccess",
                         static_cast<int>(result == 0));