Use {To/From}JavaTime for policy timestamps

components/policy/core/common/cloud/component_cloud_policy_store_unittest.cc

 // Copyright (c) 2013 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 "components/policy/core/common/cloud/component_cloud_policy_store.h"
 
 #include <stdint.h>
 
 #include <map>
 #include <memory>
@@ skipping 157 matching lines @@
   EXPECT_EQ(kTestExtension, policy_data.settings_entity_id());
   EXPECT_EQ(kTestDownload, payload.download_url());
   EXPECT_EQ(TestPolicyHash(), payload.secure_hash());
 }
 
 TEST_F(ComponentCloudPolicyStoreTest, ValidatePolicyWrongTimestamp) {
   EXPECT_CALL(store_delegate_, OnComponentCloudPolicyStoreUpdated());
   EXPECT_TRUE(store_->Store(kTestPolicyNS, CreateSerializedResponse(),
                             CreatePolicyData(), TestPolicyHash(), kTestPolicy));
 
-  const int64_t kPastTimestamp = base::TimeDelta::FromDays(1).InMilliseconds();
+  const int64_t kPastTimestamp =
+      (base::Time() + base::TimeDelta::FromDays(1)).ToJavaTime();
   CHECK_GT(ComponentPolicyBuilder::kFakeTimestamp, kPastTimestamp);
   builder_.policy_data().set_timestamp(kPastTimestamp);
   EXPECT_FALSE(store_->ValidatePolicy(kTestPolicyNS, CreateResponse(),
                                       nullptr /* policy_data */,
                                       nullptr /* payload */));
 }
 
 TEST_F(ComponentCloudPolicyStoreTest, ValidatePolicyWrongUsername) {
   builder_.policy_data().set_username("anotheruser@example.com");
   EXPECT_FALSE(store_->ValidatePolicy(kTestPolicyNS, CreateResponse(),
@@ skipping 353 matching lines @@
       ComponentPolicyBuilder::kFakeUsername,
       ComponentPolicyBuilder::kFakeToken,
       ComponentPolicyBuilder::kFakeDeviceId,
       public_key_,
       ComponentPolicyBuilder::kFakePublicKeyVersion);
   yet_another_store.Load();
   EXPECT_TRUE(yet_another_store.policy().Equals(empty_bundle));
 }
 
 }  // namespace policy