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

webrtc/modules/audio_processing/noise_suppression_impl.h

Index: webrtc/modules/audio_processing/noise_suppression_impl.h
diff --git a/webrtc/modules/audio_processing/noise_suppression_impl.h b/webrtc/modules/audio_processing/noise_suppression_impl.h
index 76a39b8e09cfc4ea0690464798091a6f7b90d2eb..8ba8d098d3e2a3549eea0af17493fb98bedfb9fb 100644
--- a/webrtc/modules/audio_processing/noise_suppression_impl.h
+++ b/webrtc/modules/audio_processing/noise_suppression_impl.h
@@ -11,6 +11,7 @@
 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_NOISE_SUPPRESSION_IMPL_H_
 #define WEBRTC_MODULES_AUDIO_PROCESSING_NOISE_SUPPRESSION_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"
 
@@ -23,7 +24,8 @@ class NoiseSuppressionImpl : public NoiseSuppression,
                              public ProcessingComponent {
  public:
   NoiseSuppressionImpl(const AudioProcessing* apm,
-                       CriticalSectionWrapper* crit);
+                       CriticalSectionWrapper* crit,
+                       rtc::ThreadChecker* capture_thread);
   virtual ~NoiseSuppressionImpl();
 
   int AnalyzeCaptureAudio(AudioBuffer* audio);
@@ -49,6 +51,7 @@ class NoiseSuppressionImpl : public NoiseSuppression,
 
   const AudioProcessing* apm_;
   CriticalSectionWrapper* crit_;
+  const rtc::ThreadChecker* const capture_thread_;
   Level level_;
 };