Replace deprecated base::NonThreadSafe in components/policy in favor of SequenceChecker.

components/policy/core/common/cloud/component_cloud_policy_store.h

 // 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.
 
 #ifndef COMPONENTS_POLICY_CORE_COMMON_CLOUD_COMPONENT_CLOUD_POLICY_STORE_H_
 #define COMPONENTS_POLICY_CORE_COMMON_CLOUD_COMPONENT_CLOUD_POLICY_STORE_H_
 
 #include <map>
 #include <memory>
 #include <string>
 
 #include "base/macros.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 #include "base/time/time.h"
 #include "components/policy/core/common/cloud/resource_cache.h"
 #include "components/policy/core/common/policy_bundle.h"
 #include "components/policy/core/common/policy_namespace.h"
 #include "components/policy/policy_export.h"
 
 namespace enterprise_management {
 class ExternalPolicyData;
 class PolicyData;
 class PolicyFetchResponse;
 }
 
 namespace policy {
 
 // Validates protobufs for external policy data, validates the data itself, and
 // caches both locally.
 //
 // The policy data is validated using the credentials that have to be passed
 // beforehand using |SetCredentials|. The expectation is that these credentials
 // should be the same as used for validating the superior policy (e.g. the user
 // policy, the device-local account policy, etc.).
-class POLICY_EXPORT ComponentCloudPolicyStore : public base::NonThreadSafe {
+class POLICY_EXPORT ComponentCloudPolicyStore {
  public:
   class POLICY_EXPORT Delegate {
    public:
     virtual ~Delegate();
 
     // Invoked whenever the policies served by policy() have changed, except
     // for the initial Load().
     virtual void OnComponentCloudPolicyStoreUpdated() = 0;
   };
 
@@ skipping 98 matching lines @@
 
   // The current list of policies.
   PolicyBundle policy_bundle_;
   // Mapping from policy namespace to data hashes for each currently exposed
   // component.
   std::map<PolicyNamespace, std::string> cached_hashes_;
   // Mapping from policy namespace to policy timestamp for each currently
   // exposed component.
   std::map<PolicyNamespace, base::Time> stored_policy_times_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   DISALLOW_COPY_AND_ASSIGN(ComponentCloudPolicyStore);
 };
 
 }  // namespace policy
 
 #endif  // COMPONENTS_POLICY_CORE_COMMON_CLOUD_COMPONENT_CLOUD_POLICY_STORE_H_