Delete all use of tick_util.h.

webrtc/modules/desktop_capture/win/screen_capturer_win_magnifier.cc

Index: webrtc/modules/desktop_capture/win/screen_capturer_win_magnifier.cc
diff --git a/webrtc/modules/desktop_capture/win/screen_capturer_win_magnifier.cc b/webrtc/modules/desktop_capture/win/screen_capturer_win_magnifier.cc
index 8af9779ce80e02f7774f7e5c9fbfb881b3ab5ffc..439b006f930b0ebf1df2f7d9a78f1b03c0a95e48 100644
--- a/webrtc/modules/desktop_capture/win/screen_capturer_win_magnifier.cc
+++ b/webrtc/modules/desktop_capture/win/screen_capturer_win_magnifier.cc
@@ -14,6 +14,7 @@
 
 #include <utility>
 
+#include "webrtc/base/timeutils.h"
 #include "webrtc/modules/desktop_capture/desktop_capture_options.h"
 #include "webrtc/modules/desktop_capture/desktop_frame.h"
 #include "webrtc/modules/desktop_capture/desktop_frame_win.h"
@@ -24,7 +25,6 @@
 #include "webrtc/modules/desktop_capture/win/desktop.h"
 #include "webrtc/modules/desktop_capture/win/screen_capture_utils.h"
 #include "webrtc/system_wrappers/include/logging.h"
-#include "webrtc/system_wrappers/include/tick_util.h"
 
 namespace webrtc {
 
@@ -88,7 +88,7 @@ void ScreenCapturerWinMagnifier::SetSharedMemoryFactory(
 }
 
 void ScreenCapturerWinMagnifier::Capture(const DesktopRegion& region) {
-  TickTime capture_start_time = TickTime::Now();
+  int64_t capture_start_time_nanos = rtc::TimeNanos();
 
   queue_.MoveToNextFrame();
 
@@ -169,7 +169,8 @@ void ScreenCapturerWinMagnifier::Capture(const DesktopRegion& region) {
   frame->mutable_updated_region()->Clear();
   helper_.TakeInvalidRegion(frame->mutable_updated_region());
   frame->set_capture_time_ms(
-      (TickTime::Now() - capture_start_time).Milliseconds());
+      (rtc::TimeNanos() - capture_start_time_nanos) /
+      rtc::kNumNanosecsPerMillisec);
   callback_->OnCaptureCompleted(frame);
 }