Remove device policy store from PolicyHeaderService since it's not used.

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

 // Copyright 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_POLICY_HEADER_SERVICE_H_
 #define COMPONENTS_POLICY_CORE_COMMON_CLOUD_POLICY_HEADER_SERVICE_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 14 matching lines @@
 // Per-profile service used to generate PolicyHeaderIOHelper objects, and
 // keep them up to date as policy changes.
 // TODO(atwilson): Move to components/policy once CloudPolicyStore is moved.
 class POLICY_EXPORT PolicyHeaderService : public CloudPolicyStore::Observer {
  public:
   // |device_policy_store| can be null on platforms that do not support
   // device policy. Both |user_policy_store| and |device_policy_store| must
   // outlive this object.
   PolicyHeaderService(const std::string& server_url,
                       const std::string& verification_key_hash,
-                      CloudPolicyStore* user_policy_store,
-                      CloudPolicyStore* device_policy_store);
+                      CloudPolicyStore* user_policy_store);
   ~PolicyHeaderService() override;
 
   // Creates a PolicyHeaderIOHelper object to be run on the IO thread and
   // add policy headers to outgoing requests. The caller takes ownership of
   // this object and must ensure it outlives ProfileHeaderService (in practice,
   // this is called by ProfileIOData, which is shutdown *after* all
   // ProfileKeyedServices are shutdown).
   std::unique_ptr<PolicyHeaderIOHelper> CreatePolicyHeaderIOHelper(
       scoped_refptr<base::SequencedTaskRunner> task_runner);
 
@@ skipping 10 matching lines @@
 
   // Weak pointer to created PolicyHeaderIOHelper objects.
   std::vector<PolicyHeaderIOHelper*> helpers_;
 
   // URL of the policy server.
   std::string server_url_;
 
   // Identifier for the verification key this Chrome instance is using.
   std::string verification_key_hash_;
 
-  // Weak pointers to User-/Device-level policy stores.
+  // Weak pointer to the User-level policy store.
   CloudPolicyStore* user_policy_store_;
-  CloudPolicyStore* device_policy_store_;
 
   DISALLOW_COPY_AND_ASSIGN(PolicyHeaderService);
 };
 
 }  // namespace policy
 
 #endif  // COMPONENTS_POLICY_CORE_COMMON_CLOUD_POLICY_HEADER_SERVICE_H_