Domain Reliability: Add rudimentary WebUI page.

components/domain_reliability/scheduler.h

 // Copyright 2014 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_DOMAIN_RELIABILITY_SCHEDULER_H_
 #define COMPONENTS_DOMAIN_RELIABILITY_SCHEDULER_H_
 
 #include <vector>
 
 #include "base/callback.h"
 #include "base/time/time.h"
 #include "components/domain_reliability/domain_reliability_export.h"
 
+namespace base {
+class Value;
+}  // namespace base
+
 namespace domain_reliability {
 
 class DomainReliabilityConfig;
 class MockableTime;
 
 // Determines when an upload should be scheduled. A domain's config will
 // specify minimum and maximum upload delays; the minimum upload delay ensures
 // that Chrome will not send too many upload requests to a site by waiting at
 // least that long after the first beacon, while the maximum upload delay makes
 // sure the server receives the reports while they are still fresh.
@@ skipping 34 matching lines @@
   // be called exactly once during or after the ScheduleUploadCallback but
   // before OnUploadComplete is called. (Also records the upload start time for
   // future retries, if the upload ends up failing.)
   size_t OnUploadStart();
 
   // Updates the scheduler state based on the result of an upload. Must be
   // called exactly once after |OnUploadStart|. |success| should be true if the
   // upload was successful, and false otherwise.
   void OnUploadComplete(bool success);
 
+  base::Value* GetWebUIData() const;
+
  private:
   struct CollectorState {
     CollectorState();
 
     // The number of consecutive failures to upload to this collector, or 0 if
     // the most recent upload succeeded.
     unsigned failures;
     base::TimeTicks next_upload;
   };
 
@@ skipping 26 matching lines @@
   // Index of the collector selected for the next upload.  (Set in
   // |OnUploadStart| and cleared in |OnUploadComplete|.)
   size_t collector_index_;
 
   // Time of the first beacon that was not included in the last successful
   // upload.
   base::TimeTicks first_beacon_time_;
 
   // first_beacon_time_ saved during uploads.  Restored if upload fails.
   base::TimeTicks old_first_beacon_time_;
+
+  // Extra bits to return in GetWebUIData.
+  base::TimeTicks scheduled_min_time_;
+  base::TimeTicks scheduled_max_time_;
+  // Whether the other last_upload_* fields are populated.
+  bool last_upload_finished_;
+  base::TimeTicks last_upload_start_time_;
+  base::TimeTicks last_upload_end_time_;
+  size_t last_upload_collector_index_;
+  bool last_upload_success_;
 };
 
 }  // namespace domain_reliability
 
 #endif  // COMPONENTS_DOMAIN_RELIABILITY_SCHEDULER_H_