Fixes for re-enabling more MSVC level 4 warnings: base/ edition

base/time/time_win.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 
 // Windows Timer Primer
 //
 // A good article:  http://www.ddj.com/windows/184416651
 // A good mozilla bug:  http://bugzilla.mozilla.org/show_bug.cgi?id=363258
 //
@@ skipping 233 matching lines @@
     return;
   }
 
   // FILETIME in UTC.
   FILETIME utc_ft;
   MicrosecondsToFileTime(us_, &utc_ft);
 
   // FILETIME in local time if necessary.
   bool success = true;
   // FILETIME in SYSTEMTIME (exploded).
-  SYSTEMTIME st;
+  SYSTEMTIME st = {0};
   if (is_local) {
     SYSTEMTIME utc_st;
     // We don't use FileTimeToLocalFileTime here, since it uses the current
     // settings for the time zone and daylight saving time. Therefore, if it is
     // daylight saving time, it will take daylight saving time into account,
     // even if the time you are converting is in standard time.
     success = FileTimeToSystemTime(&utc_ft, &utc_st) &&
               SystemTimeToTzSpecificLocalTime(NULL, &utc_st, &st);
   } else {
     success = !!FileTimeToSystemTime(&utc_ft, &st);
@@ skipping 262 matching lines @@
     return TimeTicks() + TimeDelta::FromMilliseconds(timeGetTime());
   }
 }
 
 // TimeDelta ------------------------------------------------------------------
 
 // static
 TimeDelta TimeDelta::FromQPCValue(LONGLONG qpc_value) {
   return TimeDelta(GetHighResNowSingleton()->QPCValueToMicroseconds(qpc_value));
 }