Reporting: Implement cache.

net/reporting/reporting_report.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 NET_REPORTING_REPORTING_REPORT_H_
+#define NET_REPORTING_REPORTING_REPORT_H_
+
+#include <memory>
+#include <string>
+
+#include "base/time/time.h"
+#include "net/base/net_export.h"
+#include "url/gurl.h"
+
+namespace base {
+class Value;
+}  // namespace base
+
+namespace net {
+
+// An undelivered report.
+struct NET_EXPORT ReportingReport {
+ public:
+  ReportingReport(const GURL& url,
+                  const std::string& group,
+                  const std::string& type,
+                  std::unique_ptr<const base::Value> body,
+                  base::TimeTicks queued,
+                  int attempts);
+  ~ReportingReport();
+
+  // The URL of the document that triggered the report.
+  GURL url;
+
+  // The endpoint group that should be used to deliver the report.
+  std::string group;
+
+  // The type of the report.
+  std::string type;
+
+  // The body of the report.
+  std::unique_ptr<const base::Value> body;
+
+  // When the report was queued.
+  base::TimeTicks queued;
+
+  // The number of delivery attempts made so far, not including an active
+  // attempt.
+  int attempts = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ReportingReport);
+};
+
+}  // namespace net
+
+#endif  // NET_REPORTING_REPORTING_REPORT_H_