Use clock_gettime instead of base::TimeTicks::Now() in QUIC

net/quic/platform/impl/quic_chromium_clock.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/quic/platform/impl/quic_chromium_clock.h"
 
+#if defined(OS_IOS)
+// Use clock_gettime on iOS>

[Zhongyi Shi, 2017/05/09 23:30:57]

IIRC, clock_gettime is supported and works fine on iOS 10 and MacOs, but crashes
iOS 9 according to the email thread? Do we need to get the iOS version when
using clock_gettime?

[ianswett, 2017/05/10 00:44:56]

+1

[Ryan Hamilton, 2017/05/10 03:06:04]

*facepalm*

Done.

+#include <time.h>
+#else
+// Use base::TimeTicks::Now() elsewhere.
+#include "base/time/time.h"
+#endif
+
 #include "base/memory/singleton.h"
-#include "base/time/time.h"
 
 namespace net {
 
 QuicChromiumClock* QuicChromiumClock::GetInstance() {
   return base::Singleton<QuicChromiumClock>::get();
 }
 QuicChromiumClock::QuicChromiumClock() {}
 
 QuicChromiumClock::~QuicChromiumClock() {}
 
 QuicTime QuicChromiumClock::ApproximateNow() const {
   // At the moment, Chrome does not have a distinct notion of ApproximateNow().
   // We should consider implementing this using MessageLoop::recent_time_.
   return Now();
 }
 
 QuicTime QuicChromiumClock::Now() const {
-  return QuicTime(base::TimeTicks::Now());
+#if defined(OS_IOS)
+  struct timespec tp;
+  clock_gettime(CLOCK_MONOTONIC, &tp);
+  return MakeTime(tp.tv_nsec / 1000);
+#else
+  return MakeTime(base::TimeTicks::Now().ToInternalValue());
+#endif
 }
 
 QuicWallTime QuicChromiumClock::WallNow() const {
   return QuicWallTime::FromUNIXMicroseconds(base::Time::Now().ToJavaTime() *
                                             1000);
 }
 
 }  // namespace net