Add: check exploded time is properly converted

base/time/time_posix.cc

Index: base/time/time_posix.cc
diff --git a/base/time/time_posix.cc b/base/time/time_posix.cc
index 32614bc086d2e015782470f851e76573c07e5065..a5986347f939dfefe16183a4a0aedf0984cae138 100644
--- a/base/time/time_posix.cc
+++ b/base/time/time_posix.cc
@@ -1,4 +1,4 @@
-// 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.
 
@@ -301,8 +301,21 @@ Time Time::FromExploded(bool is_local, const Exploded& exploded) {
   }
 
   // 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 ------------------------------------------------------------------