Populate a basic SystemProfileProto in UKM.

components/ukm/ukm_service.h

 // Copyright 2017 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_UKM_UKM_SERVICE_H_
 #define COMPONENTS_UKM_UKM_SERVICE_H_
 
 #include <stddef.h>
 #include <memory>
 
 #include "base/feature_list.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "build/build_config.h"
 #include "components/metrics/metrics_reporting_scheduler.h"
 #include "components/metrics/persisted_logs.h"
+#include "components/metrics/proto/ukm/report.pb.h"
 
 class PrefRegistrySimple;
 class PrefService;
 
 namespace metrics {
 class MetricsLogUploader;
 class MetricsServiceClient;
 }
 
 namespace ukm {
@@ skipping 79 matching lines @@
   // Weak pointers factory used to post task on different threads. All weak
   // pointers managed by this factory have the same lifetime as UkmService.
   base::WeakPtrFactory<UkmService> self_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(UkmService);
 };
 
 }  // namespace ukm
 
 #endif  // COMPONENTS_UKM_UKM_SERVICE_H_