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

net/quic/platform/impl/quic_chromium_clock.cc

Index: net/quic/platform/impl/quic_chromium_clock.cc
diff --git a/net/quic/platform/impl/quic_chromium_clock.cc b/net/quic/platform/impl/quic_chromium_clock.cc
index cbf1ed1b14e2c94199da029c3ec1a69e13a7a96a..dc705b2723e93cd9942021ccd08d711f1b245759 100644
--- a/net/quic/platform/impl/quic_chromium_clock.cc
+++ b/net/quic/platform/impl/quic_chromium_clock.cc
@@ -4,8 +4,15 @@
 
 #include "net/quic/platform/impl/quic_chromium_clock.h"
 
-#include "base/memory/singleton.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"
 
 namespace net {
 
@@ -23,7 +30,13 @@ QuicTime QuicChromiumClock::ApproximateNow() const {
 }
 
 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 {