[Offline Pages] Minor fix for log messages in event logger.

components/offline_pages/core/offline_event_logger_unittest.cc

Index: components/offline_pages/core/offline_event_logger_unittest.cc
diff --git a/components/offline_pages/core/offline_event_logger_unittest.cc b/components/offline_pages/core/offline_event_logger_unittest.cc
index d82ede99dbcd7e0edc13313658d494215b3a65c6..e30fae740621acd3409df277614e74be7ac8278a 100644
--- a/components/offline_pages/core/offline_event_logger_unittest.cc
+++ b/components/offline_pages/core/offline_event_logger_unittest.cc
@@ -45,9 +45,9 @@ TEST(OfflineEventLoggerTest, SettingClientAndLog) {
   logger.GetLogs(&log);
 
   EXPECT_EQ(kMaxLogCount, log.size());
-  EXPECT_EQ(client.last_log_message(), log[0]);
+  EXPECT_EQ(client.last_log_message(), log[0].substr(kTimeLength));
   EXPECT_EQ(std::string(kMessage) + std::to_string(kMaxLogCount),
-            client.last_log_message().substr(kTimeLength));
+            client.last_log_message());
 }
 
 }  // namespace offline_pages