Move logic for uploading logs into a ReportingService object.

components/metrics/metrics_reporting_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.
+
+// This file defines a service that sends metrics logs to a server.
+
+#ifndef COMPONENTS_METRICS_METRICS_REPORTING_SERVICE_H_
+#define COMPONENTS_METRICS_METRICS_REPORTING_SERVICE_H_
+
+#include <stdint.h>
+
+#include <string>
+
+#include "base/macros.h"
+#include "components/metrics/metrics_log_store.h"
+#include "components/metrics/reporting_service.h"
+
+class PrefService;
+class PrefRegistrySimple;
+
+namespace metrics {
+
+class MetricsServiceClient;
+
+// MetricsReportingService is concrete implementation of ReportingService for
+// UMA logs. It uses a MetricsLogStore as its LogStore, reports to the UMA
+// endpoint, and logs some histograms with the UMA prefix.
+class MetricsReportingService : public ReportingService {
+ public:
+  // Creates a ReportingService with the given |client|, |local_state|.
+  // Does not take ownership of the parameters; instead it stores a weak
+  // pointer to each. Caller should ensure that the parameters are valid for
+  // the lifetime of this class.
+  MetricsReportingService(MetricsServiceClient* client,
+                          PrefService* local_state);
+  ~MetricsReportingService() override;
+
+  MetricsLogStore* metrics_log_store() { return &metrics_log_store_; }
+  const MetricsLogStore* metrics_log_store() const {
+    return &metrics_log_store_;
+  }
+
+  // Registers local state prefs used by this class.
+  static void RegisterPrefs(PrefRegistrySimple* registry);
+
+ private:
+  // ReportingService:
+  LogStore* log_store() override;
+  std::string GetUploadUrl() const override;
+  base::StringPiece upload_mime_type() const override;
+  MetricsLogUploader::MetricServiceType service_type() const override;
+  void LogActualUploadInterval(base::TimeDelta interval) override;
+  void LogCellularConstraint(bool upload_canceled) override;
+  void LogResponseCode(int response_code) override;
+  void LogSuccess(size_t log_size) override;
+  void LogLargeRejection(size_t log_size) override;
+
+  MetricsLogStore metrics_log_store_;
+
+  DISALLOW_COPY_AND_ASSIGN(MetricsReportingService);
+};
+
+}  // namespace metrics
+
+#endif  // COMPONENTS_METRICS_METRICS_REPORTING_SERVICE_H_