Delete all use of tick_util.h.

webrtc/modules/rtp_rtcp/source/rtp_sender.cc

Index: webrtc/modules/rtp_rtcp/source/rtp_sender.cc
diff --git a/webrtc/modules/rtp_rtcp/source/rtp_sender.cc b/webrtc/modules/rtp_rtcp/source/rtp_sender.cc
index f7b72b875c785358d42179f333ff2173075c0e99..2e504660e587145a120175378e7467b4975a81d2 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_sender.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtp_sender.cc
@@ -17,6 +17,7 @@
 #include "webrtc/base/checks.h"
 #include "webrtc/base/logging.h"
 #include "webrtc/base/trace_event.h"
+#include "webrtc/base/timeutils.h"
 #include "webrtc/call.h"
 #include "webrtc/call/rtc_event_log.h"
 #include "webrtc/modules/rtp_rtcp/include/rtp_cvo.h"
@@ -24,7 +25,6 @@
 #include "webrtc/modules/rtp_rtcp/source/rtp_sender_audio.h"
 #include "webrtc/modules/rtp_rtcp/source/rtp_sender_video.h"
 #include "webrtc/modules/rtp_rtcp/source/time_util.h"
-#include "webrtc/system_wrappers/include/tick_util.h"
 
 namespace webrtc {
 
@@ -116,9 +116,8 @@ RTPSender::RTPSender(
     RtcEventLog* event_log)
     : clock_(clock),
       // TODO(holmer): Remove this conversion when we remove the use of
-      // TickTime.
-      clock_delta_ms_(clock_->TimeInMilliseconds() -
-                      TickTime::MillisecondTimestamp()),
+      // TickTime. TODO(nisse): Is that now?

[stefan-webrtc, 2016/04/19 09:19:12]

Not sure. We should remove it when the same clock implementation is used for
capture_time_ms (line 1117) as is used within rtp_rtcp. 

[nisse-webrtc, 2016/04/19 12:19:25]

I expect more changes to timestamps. I'm dropping my added comment.

+      clock_delta_ms_(clock_->TimeInMilliseconds() - rtc::Time64()),
       random_(clock_->TimeInMicroseconds()),
       bitrates_(bitrate_callback),
       total_bitrate_sent_(clock, bitrates_.total_bitrate_observer()),