Add function support for Sleep and MessageLoop with TimeDelta input.

base/threading/platform_thread_posix.cc

 // Copyright (c) 2011 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/threading/platform_thread.h"
 
 #include <errno.h>
 #include <sched.h>
 
 #include "base/lazy_instance.h"
@@ skipping 134 matching lines @@
 #endif
 }
 
 // static
 void PlatformThread::YieldCurrentThread() {
   sched_yield();
 }
 
 // static
 void PlatformThread::Sleep(int duration_ms) {
+  // NOTE: This function will be supplanted by the other version of Sleep
+  // in the future.  See issue 108171 for more information.
+  Sleep(TimeDelta::FromMilliseconds(duration_ms));
+}
+
+// static
+void PlatformThread::Sleep(TimeDelta duration) {
   struct timespec sleep_time, remaining;
 
-  // Contains the portion of duration_ms >= 1 sec.
-  sleep_time.tv_sec = duration_ms / 1000;
-  duration_ms -= sleep_time.tv_sec * 1000;
-
-  // Contains the portion of duration_ms < 1 sec.
-  sleep_time.tv_nsec = duration_ms * 1000 * 1000;  // nanoseconds.
+  // Break the duration into seconds and nanoseconds.
+  // NOTE: TimeDelta's microseconds are int64s while timespec's
+  // nanoseconds are longs, so this unpacking must prevent overflow.
+  sleep_time.tv_sec = duration.InSeconds();
+  duration -= TimeDelta::FromSeconds(sleep_time.tv_sec);
+  sleep_time.tv_nsec = duration.InMicroseconds() * 1000;  // nanoseconds
 
   while (nanosleep(&sleep_time, &remaining) == -1 && errno == EINTR)
     sleep_time = remaining;
 }
 
 #if defined(OS_LINUX)
 // static
 void PlatformThread::SetName(const char* name) {
   // have to cast away const because ThreadLocalPointer does not support const
   // void*
@@ skipping 69 matching lines @@
 // Mac OS X uses lower-level mach APIs
 
 // static
 void PlatformThread::SetThreadPriority(PlatformThreadHandle, ThreadPriority) {
   // TODO(crogers): implement
   NOTIMPLEMENTED();
 }
 #endif
 
 }  // namespace base