Fix more disabled MSVC warnings, base/ edition.

base/time/time_win.cc

Index: base/time/time_win.cc
diff --git a/base/time/time_win.cc b/base/time/time_win.cc
index 845ae95c80d748918842d77a8fcfcd6b47c554ad..006118091fc4ee74584ca10784487cbf73c4b70e 100644
--- a/base/time/time_win.cc
+++ b/base/time/time_win.cc
@@ -227,14 +227,14 @@ Time Time::FromExploded(bool is_local, const Exploded& exploded) {
   // Create the system struct representing our exploded time. It will either be
   // in local time or UTC.
   SYSTEMTIME st;
-  st.wYear = exploded.year;
-  st.wMonth = exploded.month;
-  st.wDayOfWeek = exploded.day_of_week;
-  st.wDay = exploded.day_of_month;
-  st.wHour = exploded.hour;
-  st.wMinute = exploded.minute;
-  st.wSecond = exploded.second;
-  st.wMilliseconds = exploded.millisecond;
+  st.wYear = static_cast<WORD>(exploded.year);
+  st.wMonth = static_cast<WORD>(exploded.month);
+  st.wDayOfWeek = static_cast<WORD>(exploded.day_of_week);
+  st.wDay = static_cast<WORD>(exploded.day_of_month);
+  st.wHour = static_cast<WORD>(exploded.hour);
+  st.wMinute = static_cast<WORD>(exploded.minute);
+  st.wSecond = static_cast<WORD>(exploded.second);
+  st.wMilliseconds = static_cast<WORD>(exploded.millisecond);
 
   FILETIME ft;
   bool success = true;