Fix some clang warnings with -Wmissing-braces in base.

base/message_loop/message_pump_win.cc

Index: base/message_loop/message_pump_win.cc
diff --git a/base/message_loop/message_pump_win.cc b/base/message_loop/message_pump_win.cc
index 187678aac913e7ad312dc10cb3ab956c318e182e..8e627d0e5bd86d32b11a856b87f88aa8a7f050a1 100644
--- a/base/message_loop/message_pump_win.cc
+++ b/base/message_loop/message_pump_win.cc
@@ -477,7 +477,7 @@ void MessagePumpForUI::PostWorkMessage() {
 void MessagePumpForUI::SetWakeupTimer(int64 delay_ms) {
   // Set the timer for the delay passed in. The actual resolution of the
   // timer is dependent on whether timeBeginPeriod was called.
-  LARGE_INTEGER due_time = {0};
+  LARGE_INTEGER due_time = {};
   due_time.QuadPart = -delay_ms * 10000;
   BOOL timer_set = ::SetWaitableTimer(ui_worker_thread_timer_.Get(),
       &due_time, 0, NULL, NULL, FALSE);