Fix black background when locking with fullscreen window:

base/time_win.cc

Index: base/time_win.cc
diff --git a/base/time_win.cc b/base/time_win.cc
index 6d8e4328b3000b3bc3b04a3dbe6b16fe3606fc16..ab308157ef7092f8663bdc8f2ba2d4d14854b9b9 100644
--- a/base/time_win.cc
+++ b/base/time_win.cc
@@ -103,6 +103,9 @@ int Time::high_resolution_timer_activated_ = 0;
 
 // static
 Time Time::Now() {
+  if (TimeFactory::instance())
+    return TimeFactory::instance()->TimeNow();
+
   if (initial_time == 0)
     InitializeClock();
 
@@ -451,11 +454,17 @@ TimeTicks::TickFunctionType TimeTicks::SetMockTickFunction(
 
 // static
 TimeTicks TimeTicks::Now() {
+  if (TimeFactory::instance())
+    return TimeFactory::instance()->TimeTicksNow();
+
   return TimeTicks() + RolloverProtectedNow();
 }
 
 // static
 TimeTicks TimeTicks::HighResNow() {
+  if (TimeFactory::instance())
+    return TimeFactory::instance()->TimeTicksHighResNow();
+
   return TimeTicks() + HighResNowSingleton::GetInstance()->Now();
 }