Remove definition of ThreadTicks::Now from time.cc

This removes a dependency platform_thread.h through time_win.cc.
---
 base/time/time.cc     | 4 ++++
 base/time/time_win.cc | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/base/time/time.cc b/base/time/time.cc
index 723ece8a838b..1685885ec8e9 100644
--- a/base/time/time.cc
+++ b/base/time/time.cc
@@ -46,8 +46,10 @@ std::atomic<TimeTicksNowFunction> g_time_ticks_now_function{
 std::atomic<LiveTicksNowFunction> g_live_ticks_now_function{
     &subtle::LiveTicksNowIgnoringOverride};
 
+#if !defined(MOZ_ZUCCHINI)
 std::atomic<ThreadTicksNowFunction> g_thread_ticks_now_function{
     &subtle::ThreadTicksNowIgnoringOverride};
+#endif  // !defined(MOZ_ZUCCHINI)
 
 }  // namespace internal
 
@@ -285,10 +287,12 @@ LiveTicks LiveTicksNowIgnoringOverride() {
 // ThreadTicks ----------------------------------------------------------------
 
 // static
+#if !defined(MOZ_ZUCCHINI)
 ThreadTicks ThreadTicks::Now() {
   return internal::g_thread_ticks_now_function.load(
       std::memory_order_relaxed)();
 }
+#endif  // !defined(MOZ_ZUCCHINI)
 
 std::ostream& operator<<(std::ostream& os, ThreadTicks thread_ticks) {
   const TimeDelta as_time_delta = thread_ticks - ThreadTicks();
diff --git a/base/time/time_win.cc b/base/time/time_win.cc
index c6540592a5c1..60f71441575b 100644
--- a/base/time/time_win.cc
+++ b/base/time/time_win.cc
@@ -47,7 +47,9 @@
 #include "base/cpu.h"
 #include "base/notreached.h"
 #include "base/synchronization/lock.h"
+#if !defined(MOZ_ZUCCHINI)
 #include "base/threading/platform_thread.h"
+#endif  // !defined(MOZ_ZUCCHINI)
 #include "base/time/time_override.h"
 #include "build/build_config.h"
 
@@ -656,6 +658,7 @@ LiveTicks LiveTicksNowIgnoringOverride() {
 
 // ThreadTicks ----------------------------------------------------------------
 
+#if !defined(MOZ_ZUCCHINI)
 namespace subtle {
 ThreadTicks ThreadTicksNowIgnoringOverride() {
   return ThreadTicks::GetForThread(PlatformThread::CurrentHandle());
@@ -697,6 +700,7 @@ ThreadTicks ThreadTicks::GetForThread(
 
   return ThreadTicks(us);
 }
+#endif  // !defined(MOZ_ZUCCHINI)
 
 // static
 bool ThreadTicks::IsSupportedWin() {
-- 
2.42.0.windows.2