Fix black background when locking with fullscreen window:

base/time_posix.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 <sys/time.h>
 #include <time.h>
 #if defined(OS_ANDROID)
 #include <time64.h>
@@ skipping 93 matching lines @@
 const int64 Time::kWindowsEpochDeltaMicroseconds =
     kWindowsEpochDeltaSeconds * Time::kMicrosecondsPerSecond;
 
 // Some functions in time.cc use time_t directly, so we provide an offset
 // to convert from time_t (Unix epoch) and internal (Windows epoch).
 // static
 const int64 Time::kTimeTToMicrosecondsOffset = kWindowsEpochDeltaMicroseconds;
 
 // static
 Time Time::Now() {
+  if (TimeFactory::instance())
+    return TimeFactory::instance()->TimeNow();
+
   struct timeval tv;
   struct timezone tz = { 0, 0 };  // UTC
   if (gettimeofday(&tv, &tz) != 0) {
     DCHECK(0) << "Could not determine time of day";
     LOG_ERRNO(ERROR) << "Call to gettimeofday failed.";
     // Return null instead of uninitialized |tv| value, which contains random
     // garbage data. This may result in the crash seen in crbug.com/147570.
     return Time();
   }
   // Combine seconds and microseconds in a 64-bit field containing microseconds
@@ skipping 106 matching lines @@
 }
 
 // TimeTicks ------------------------------------------------------------------
 // FreeBSD 6 has CLOCK_MONOLITHIC but defines _POSIX_MONOTONIC_CLOCK to -1.
 #if (defined(OS_POSIX) &&                          \
      defined(_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0) || \
      defined(OS_BSD) || defined(OS_ANDROID)
 
 // static
 TimeTicks TimeTicks::Now() {
+  if (TimeFactory::instance())
+    return TimeFactory::instance()->TimeTicksNow();
+
   uint64_t absolute_micro;
 
   struct timespec ts;
   if (clock_gettime(CLOCK_MONOTONIC, &ts) != 0) {
     NOTREACHED() << "clock_gettime(CLOCK_MONOTONIC) failed.";
     return TimeTicks();
   }
 
   absolute_micro =
       (static_cast<int64>(ts.tv_sec) * Time::kMicrosecondsPerSecond) +
@@ skipping 71 matching lines @@
     result.tv_usec = static_cast<suseconds_t>(Time::kMicrosecondsPerSecond) - 1;
     return result;
   }
   int64 us = us_ - kTimeTToMicrosecondsOffset;
   result.tv_sec = us / Time::kMicrosecondsPerSecond;
   result.tv_usec = us % Time::kMicrosecondsPerSecond;
   return result;
 }
 
 }  // namespace base