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..8a01b0ca509c7788d12265ea13b469d026c7dfc7 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();
 
@@ -451,6 +454,9 @@ TimeTicks::TickFunctionType TimeTicks::SetMockTickFunction(
 
 // static
 TimeTicks TimeTicks::Now() {
+  if (TimeFactory::instance())
+    return TimeFactory::instance()->TimeTicksNow();
+
   return TimeTicks() + RolloverProtectedNow();
 }