Wire up CertificateReportingService to handle report uploads

chrome/browser/safe_browsing/certificate_reporting_metrics_provider.h

 // Copyright 2016 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 CHROME_BROWSER_SAFE_BROWSING_CERTIFICATE_REPORTING_METRICS_PROVIDER_H_
 #define CHROME_BROWSER_SAFE_BROWSING_CERTIFICATE_REPORTING_METRICS_PROVIDER_H_
 
 #include "base/macros.h"
 #include "components/metrics/metrics_provider.h"
 
-// When user metrics are about to be uploaded,
+// CertificateReportingService doesn't do its own scheduling when retrying
+// uploads of failed reports. Instead, it piggybacks off of the metrics service
+// scheduler.
+//
+// When the metrics services requests metrics to be uploaded,
 // CertificateReportingMetricsProvider looks up the CertificateReportingService
-// for the current profile and tells it to record its metrics before the upload
-// occurs.
+// for the current profile and tells it send all pending reports at once.
 class CertificateReportingMetricsProvider : public metrics::MetricsProvider {
  public:
   CertificateReportingMetricsProvider();
   ~CertificateReportingMetricsProvider() override;
 
   // metrics:MetricsProvider:
   void ProvideGeneralMetrics(
       metrics::ChromeUserMetricsExtension* unused) override;
 };
 
 #endif  // CHROME_BROWSER_SAFE_BROWSING_CERTIFICATE_REPORTING_METRICS_PROVIDER_H_