Revert 140102 - Remove old PostDelayedTask interfaces that use int ms instead of TimeDelta.

base/threading/platform_thread_posix.cc

Index: base/threading/platform_thread_posix.cc
===================================================================
--- base/threading/platform_thread_posix.cc	(revision 140108)
+++ base/threading/platform_thread_posix.cc	(working copy)
@@ -176,6 +176,13 @@
 }
 
 // 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;