Delete all use of tick_util.h.

webrtc/video/vie_sync_module.h

Index: webrtc/video/vie_sync_module.h
diff --git a/webrtc/video/vie_sync_module.h b/webrtc/video/vie_sync_module.h
index 8a1933b7ea42fae8ba0255fd015c7e65c2f997af..18b6c5d09484c50ae03f13a18da3cb552bb89256 100644
--- a/webrtc/video/vie_sync_module.h
+++ b/webrtc/video/vie_sync_module.h
@@ -18,7 +18,6 @@
 
 #include "webrtc/base/criticalsection.h"
 #include "webrtc/modules/include/module.h"
-#include "webrtc/system_wrappers/include/tick_util.h"
 #include "webrtc/video/stream_synchronization.h"
 #include "webrtc/voice_engine/include/voe_video_sync.h"
 
@@ -61,7 +60,7 @@ class ViESyncModule : public Module {
   RtpRtcp* video_rtp_rtcp_;
   int voe_channel_id_;
   VoEVideoSync* voe_sync_interface_;
-  TickTime last_sync_time_;
+  int64_t last_sync_time_;
   std::unique_ptr<StreamSynchronization> sync_;
   StreamSynchronization::Measurements audio_measurement_;
   StreamSynchronization::Measurements video_measurement_;