Implement the Notification `timestamp` property

content/browser/notifications/notification_database_data_unittest.cc

Index: content/browser/notifications/notification_database_data_unittest.cc
diff --git a/content/browser/notifications/notification_database_data_unittest.cc b/content/browser/notifications/notification_database_data_unittest.cc
index a080ae4d5581dae8e1d1da24853eb0cece12f2ba..4765dba2241c495f80845b8fa443539565164a7a 100644
--- a/content/browser/notifications/notification_database_data_unittest.cc
+++ b/content/browser/notifications/notification_database_data_unittest.cc
@@ -8,6 +8,7 @@
 #include "base/macros.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/time/time.h"
 #include "content/browser/notifications/notification_database_data.pb.h"
 #include "content/browser/notifications/notification_database_data_conversions.h"
 #include "content/common/notification_constants.h"
@@ -27,6 +28,7 @@ const char kNotificationBody[] = "Hello, world!";
 const char kNotificationTag[] = "my_tag";
 const char kNotificationIconUrl[] = "https://example.com/icon.png";
 const int kNotificationVibrationPattern[] = {100, 200, 300};
+const double kNotificationTimestamp = 621046800.;
 const unsigned char kNotificationData[] = {0xdf, 0xff, 0x0, 0x0, 0xff, 0xdf};
 
 TEST(NotificationDatabaseDataTest, SerializeAndDeserializeData) {
@@ -46,6 +48,7 @@ TEST(NotificationDatabaseDataTest, SerializeAndDeserializeData) {
   notification_data.tag = kNotificationTag;
   notification_data.icon = GURL(kNotificationIconUrl);
   notification_data.vibration_pattern = vibration_pattern;
+  notification_data.timestamp = base::Time::FromJsTime(kNotificationTimestamp);
   notification_data.silent = true;
   notification_data.require_interaction = true;
   notification_data.data = developer_data;
@@ -92,6 +95,7 @@ TEST(NotificationDatabaseDataTest, SerializeAndDeserializeData) {
   EXPECT_THAT(copied_notification_data.vibration_pattern,
               testing::ElementsAreArray(kNotificationVibrationPattern));
 
+  EXPECT_EQ(notification_data.timestamp, copied_notification_data.timestamp);
   EXPECT_EQ(notification_data.silent, copied_notification_data.silent);
   EXPECT_EQ(notification_data.require_interaction,
             copied_notification_data.require_interaction);