Preparational work for an upcoming addition of a threadchecking scheme for APM

webrtc/modules/audio_processing/voice_detection_impl.h

Index: webrtc/modules/audio_processing/voice_detection_impl.h
diff --git a/webrtc/modules/audio_processing/voice_detection_impl.h b/webrtc/modules/audio_processing/voice_detection_impl.h
index b18808316e7bc09667820f8e5f61427417410a06..9735dcde657dc8cf401d6c9447d6e73da57582fe 100644
--- a/webrtc/modules/audio_processing/voice_detection_impl.h
+++ b/webrtc/modules/audio_processing/voice_detection_impl.h
@@ -11,6 +11,7 @@
 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_VOICE_DETECTION_IMPL_H_
 #define WEBRTC_MODULES_AUDIO_PROCESSING_VOICE_DETECTION_IMPL_H_
 
+#include "webrtc/base/thread_checker.h"
 #include "webrtc/modules/audio_processing/include/audio_processing.h"
 #include "webrtc/modules/audio_processing/processing_component.h"
 
@@ -22,7 +23,9 @@ class CriticalSectionWrapper;
 class VoiceDetectionImpl : public VoiceDetection,
                            public ProcessingComponent {
  public:
-  VoiceDetectionImpl(const AudioProcessing* apm, CriticalSectionWrapper* crit);
+  VoiceDetectionImpl(const AudioProcessing* apm,
+                     CriticalSectionWrapper* crit,
+                     rtc::ThreadChecker* capture_thread);
   virtual ~VoiceDetectionImpl();
 
   int ProcessCaptureAudio(AudioBuffer* audio);
@@ -53,6 +56,7 @@ class VoiceDetectionImpl : public VoiceDetection,
 
   const AudioProcessing* apm_;
   CriticalSectionWrapper* crit_;
+  const rtc::ThreadChecker* const capture_thread_;
   bool stream_has_voice_;
   bool using_external_vad_;
   Likelihood likelihood_;