Fix a possible crash on windows.

base/time_win.cc

 // Copyright (c) 2011 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 221 matching lines @@
   FILETIME ft;
   if (is_local)
     success = FileTimeToLocalFileTime(&utc_ft, &ft);
   else
     ft = utc_ft;
 
   // FILETIME in SYSTEMTIME (exploded).
   SYSTEMTIME st;
   if (!success || !FileTimeToSystemTime(&ft, &st)) {
     NOTREACHED() << "Unable to convert time, don't know why";
-    ZeroMemory(exploded, sizeof(exploded));
+    ZeroMemory(exploded, sizeof(*exploded));
     return;
   }
 
   exploded->year = st.wYear;
   exploded->month = st.wMonth;
   exploded->day_of_week = st.wDayOfWeek;
   exploded->day_of_month = st.wDay;
   exploded->hour = st.wHour;
   exploded->minute = st.wMinute;
   exploded->second = st.wSecond;
@@ skipping 165 matching lines @@
 
 // static
 int64 TimeTicks::GetQPCDriftMicroseconds() {
   return HighResNowSingleton::GetInstance()->GetQPCDriftMicroseconds();
 }
 
 // static
 bool TimeTicks::IsHighResClockWorking() {
   return HighResNowSingleton::GetInstance()->IsUsingHighResClock();
 }