[Sync] Use un-expired time for testing

ios/chrome/test/app/sync_test_util.mm

 // Copyright 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.
 
 #import "ios/chrome/test/app/sync_test_util.h"
 
 #include <set>
 #include <string>
 
 #include "base/logging.h"
@@ skipping 231 matching lines @@
   return result == testing::AssertionSuccess();
 }
 
 void AddTypedURLOnClient(const GURL& url) {
   ios::ChromeBrowserState* browser_state =
       chrome_test_util::GetOriginalBrowserState();
   history::HistoryService* historyService =
       ios::HistoryServiceFactory::GetForBrowserState(
           browser_state, ServiceAccessType::EXPLICIT_ACCESS);
 
-  historyService->AddPage(url, base::Time::UnixEpoch(), nullptr, 1, GURL(),
+  historyService->AddPage(url, base::Time::Now(), nullptr, 1, GURL(),
                           history::RedirectList(), ui::PAGE_TRANSITION_TYPED,
                           history::SOURCE_BROWSED, false);
 }
 
 void InjectTypedURLOnFakeSyncServer(const std::string& url) {
   DCHECK(gSyncFakeServer);
   sync_pb::EntitySpecifics entitySpecifics;
   sync_pb::TypedUrlSpecifics* typedUrl = entitySpecifics.mutable_typed_url();
   typedUrl->set_url(url);
   typedUrl->set_title(url);
@@ skipping 79 matching lines @@
     }
   }
   if (!entity_id.empty()) {
     std::unique_ptr<fake_server::FakeServerEntity> entity;
     entity = fake_server::TombstoneEntity::Create(entity_id, std::string());
     gSyncFakeServer->InjectEntity(std::move(entity));
   }
 }
 
 }  // namespace chrome_test_util