Make ProcessWatcher use kqueues on Mac.

base/time_posix.cc

 // Copyright (c) 2006-2008 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 "base/time.h"
 
 #include <sys/time.h>
 #include <time.h>
 
 #include <limits>
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 
 namespace base {
 
+#if !defined(OS_MACOSX)
 // The Time routines in this file use standard POSIX routines, or almost-
 // standard routines in the case of timegm.  We need to use a Mach-specific
 // function for TimeTicks::Now() on Mac OS X.
 
 // Time -----------------------------------------------------------------------
 
 // Windows uses a Gregorian epoch of 1601.  We need to match this internally
 // so that our time representations match across all platforms.  See bug 14734.
 //   irb(main):010:0> Time.at(0).getutc()
 //   => Thu Jan 01 00:00:00 UTC 1970
@@ skipping 140 matching lines @@
 
 #else  // _POSIX_MONOTONIC_CLOCK
 #error No usable tick clock function on this platform.
 #endif  // _POSIX_MONOTONIC_CLOCK
 
 // static
 TimeTicks TimeTicks::HighResNow() {
   return Now();
 }
 
+#endif  // !OS_MACOSX
+
+struct timespec TimeDelta::ToTimeSpec() const {
+  int64 microseconds = InMicroseconds();
+  time_t seconds = 0;
+  if (microseconds >= Time::kMicrosecondsPerSecond) {
+    seconds = InSeconds();
+    microseconds -= seconds * Time::kMicrosecondsPerSecond;
+  }
+  struct timespec result =
+      {seconds,
+       microseconds * Time::kNanosecondsPerMicrosecond};
+  return result;
+}
+
 }  // namespace base