Add function support for Sleep and MessageLoop with TimeDelta input.

base/threading/platform_thread.h

Index: base/threading/platform_thread.h
diff --git a/base/threading/platform_thread.h b/base/threading/platform_thread.h
index 8382bbeb01790ddb4dbce207e35488bfdf55b684..f958ef6c7db61f09ec7a55bb513b275592b0b241 100644
--- a/base/threading/platform_thread.h
+++ b/base/threading/platform_thread.h
@@ -12,6 +12,7 @@
 
 #include "base/base_export.h"
 #include "base/basictypes.h"
+#include "base/time.h"
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
@@ -74,6 +75,9 @@ class BASE_EXPORT PlatformThread {
   // Sleeps for the specified duration (units are milliseconds).
   static void Sleep(int duration_ms);
 
+  // Sleeps for the specified duration.
+  static void Sleep(base::TimeDelta duration);
+
   // Sets the thread name visible to debuggers/tools. This has no effect
   // otherwise. This name pointer is not copied internally. Thus, it must stay
   // valid until the thread ends.