Remove old Sleep and PostDelayedTask interfaces that use int ms instead of TimeDelta.

base/task_runner.h

Index: base/task_runner.h
diff --git a/base/task_runner.h b/base/task_runner.h
index 894eb878f603d5fa5fe7030704374b5899533221..c1e1758a960ba03c12867ff1d6c6f65252593593 100644
--- a/base/task_runner.h
+++ b/base/task_runner.h
@@ -72,11 +72,6 @@ class BASE_EXPORT TaskRunner
   //
   // It is valid for an implementation to ignore |delay_ms|; that is,
   // to have PostDelayedTask behave the same as PostTask.
-  //
-  // TODO(tedv): Make PostDelayedTask use TimeDelta instead.
-  virtual bool PostDelayedTask(const tracked_objects::Location& from_here,
-                               const Closure& task,
-                               int64 delay_ms) = 0;
   virtual bool PostDelayedTask(const tracked_objects::Location& from_here,
                                const Closure& task,
                                base::TimeDelta delay) = 0;