Add: check exploded time is properly converted

base/time/time_posix.cc

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Copyright (c) 2016 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/time.h"
 
 #include <stdint.h>
 #include <sys/time.h>
 #include <time.h>
 #if defined(OS_ANDROID) && !defined(__LP64__)
 #include <time64.h>
@@ skipping 282 matching lines @@
       milliseconds = min_seconds * kMillisecondsPerSecond;
     } else {
       milliseconds = max_seconds * kMillisecondsPerSecond;
       milliseconds += (kMillisecondsPerSecond - 1);
     }
   } else {
     milliseconds = seconds * kMillisecondsPerSecond + exploded.millisecond;
   }
 
   // Adjust from Unix (1970) to Windows (1601) epoch.
-  return Time((milliseconds * kMicrosecondsPerMillisecond) +
-      kWindowsEpochDeltaMicroseconds);
+  base::Time t_time = Time((milliseconds * kMicrosecondsPerMillisecond) +
+                           kWindowsEpochDeltaMicroseconds);
+  // If |exploded.day_of_month| is set to 31
+  // on a 28-30 day month, it will return the first day of the next month.
+  // Thus round-trip the time and compare the initial |exploded| with
+  // |utc_to_exploded| time.
+  // If they are not same, return Time(0).
+  // Windows and Mac implementations return Time(0) on failure.
+  base::Time::Exploded to_exploded = {0};
+  if (!is_local)
+    t_time.UTCExplode(&to_exploded);
+  else
+    t_time.LocalExplode(&to_exploded);
+
+  return to_exploded != exploded ? Time(0) : t_time;
 }
 
 // TimeTicks ------------------------------------------------------------------
 // static
 TimeTicks TimeTicks::Now() {
   return TimeTicks(ClockNow(CLOCK_MONOTONIC));
 }
 
 // static
 TimeTicks::Clock TimeTicks::GetClock() {
@@ skipping 43 matching lines @@
     result.tv_usec = static_cast<suseconds_t>(Time::kMicrosecondsPerSecond) - 1;
     return result;
   }
   int64_t us = us_ - kTimeTToMicrosecondsOffset;
   result.tv_sec = us / Time::kMicrosecondsPerSecond;
   result.tv_usec = us % Time::kMicrosecondsPerSecond;
   return result;
 }
 
 }  // namespace base