Reporting: Add histograms.

net/reporting/reporting_report.cc

 // 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.
 
 #include "net/reporting/reporting_report.h"
 
 #include <memory>
 #include <string>
 #include <utility>
 
+#include "base/metrics/histogram_macros.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "url/gurl.h"
 
 namespace net {
 
+namespace {
+
+void RecordReportOutcome(ReportingReport::Outcome outcome) {
+  UMA_HISTOGRAM_ENUMERATION("Reporting.ReportOutcome", outcome,
+                            ReportingReport::Outcome::MAX);
+}
+
+}  // namespace
+
 ReportingReport::ReportingReport(const GURL& url,
                                  const std::string& group,
                                  const std::string& type,
                                  std::unique_ptr<const base::Value> body,
                                  base::TimeTicks queued,
                                  int attempts)
     : url(url),
       group(group),
       type(type),
       body(std::move(body)),
       queued(queued),
-      attempts(attempts) {}
+      attempts(attempts),
+      outcome(Outcome::UNKNOWN),
+      recorded_outcome(false) {}
 
-ReportingReport::~ReportingReport() {}
+ReportingReport::~ReportingReport() {
+  DCHECK(recorded_outcome);
+}
+
+// static
+void ReportingReport::RecordReportDiscardedForNoURLRequestContext() {
+  RecordReportOutcome(Outcome::DISCARDED_NO_URL_REQUEST_CONTEXT);
+}
+
+// static
+void ReportingReport::RecordReportDiscardedForNoReportingService() {
+  RecordReportOutcome(Outcome::DISCARDED_NO_REPORTING_SERVICE);
+}
+
+void ReportingReport::RecordOutcome(base::TimeTicks now) {
+  DCHECK(!recorded_outcome);
+
+  RecordReportOutcome(outcome);
+
+  if (outcome == Outcome::DELIVERED) {
+    UMA_HISTOGRAM_LONG_TIMES_100("Reporting.ReportDeliveredLatency",
+                                 now - queued);
+    UMA_HISTOGRAM_COUNTS_100("Reporting.ReportDeliveredAttempts", attempts);
+  }
+
+  recorded_outcome = true;
+}
 
 }  // namespace net