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

remoting/base/scoped_thread_proxy.h

Index: remoting/base/scoped_thread_proxy.h
diff --git a/remoting/base/scoped_thread_proxy.h b/remoting/base/scoped_thread_proxy.h
index 9e43a15428b1c68ba3ced315bd233e8f233dda49..8e69d8f9b9494615dfc39d4bd30115c74a292be8 100644
--- a/remoting/base/scoped_thread_proxy.h
+++ b/remoting/base/scoped_thread_proxy.h
@@ -54,7 +54,7 @@ class ScopedThreadProxy {
                 const base::Closure& closure);
   void PostDelayedTask(const tracked_objects::Location& from_here,
                        const base::Closure& closure,
-                       int64 delay_ms);
+                       base::TimeDelta delay);
 
   // Cancels all tasks posted via this proxy. Must be called on the
   // thread this object belongs to.