Fix black background when locking with fullscreen window:

base/time.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.
 
 #include "base/time.h"
 
 #include <math.h>
 #if defined(OS_WIN)
 #include <float.h>
 #endif
 
 #include <limits>
 
 #include "base/sys_string_conversions.h"
 #include "base/third_party/nspr/prtime.h"
 
 #include "base/logging.h"
 
 namespace base {
 
+// static
+TimeFactory* TimeFactory::instance_ = NULL;
+
 namespace {
 #if defined(OS_WIN)
 inline bool isnan(double num) { return !!_isnan(num); }
 #endif
 }
 
 // TimeDelta ------------------------------------------------------------------
 
 int TimeDelta::InDays() const {
   return static_cast<int>(delta_ / Time::kMicrosecondsPerDay);
@@ skipping 156 matching lines @@
   return is_in_range(month, 1, 12) &&
          is_in_range(day_of_week, 0, 6) &&
          is_in_range(day_of_month, 1, 31) &&
          is_in_range(hour, 0, 23) &&
          is_in_range(minute, 0, 59) &&
          is_in_range(second, 0, 60) &&
          is_in_range(millisecond, 0, 999);
 }
 
 }  // namespace base