--- a/third_party/webrtc/modules/audio_processing/aec3/clockdrift_detector.h	2020-05-22 15:16:41.083666290 +0800
+++ b/third_party/webrtc/modules/audio_processing/aec3/clockdrift_detector.h	2020-05-22 15:16:05.620205159 +0800
@@ -11,6 +11,7 @@
 #ifndef MODULES_AUDIO_PROCESSING_AEC3_CLOCKDRIFT_DETECTOR_H_
 #define MODULES_AUDIO_PROCESSING_AEC3_CLOCKDRIFT_DETECTOR_H_
 
+#include <cstddef>
 #include <array>
 
 namespace webrtc {