Domain Reliability: Measure backoff/retry time to collectors.

components/domain_reliability/context.cc

 // 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.
 
 #include "components/domain_reliability/context.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/json/json_writer.h"
@@ skipping 238 matching lines @@
   if (result.is_success())
     CommitUpload();
   else
     RollbackUpload();
   scheduler_.OnUploadComplete(result);
   UMA_HISTOGRAM_BOOLEAN("DomainReliability.UploadSuccess",
       result.is_success());
   DCHECK(!upload_time_.is_null());
   UMA_HISTOGRAM_MEDIUM_TIMES("DomainReliability.UploadDuration",
                              time_->NowTicks() - upload_time_);
+  UMA_HISTOGRAM_LONG_TIMES("DomainReliability.UploadCollectorRetryDelay",
+                           scheduler_.last_collector_retry_delay());
   last_upload_time_ = upload_time_;
   upload_time_ = base::TimeTicks();
 }
 
 scoped_ptr<const Value> DomainReliabilityContext::CreateReport(
     base::TimeTicks upload_time) const {
   scoped_ptr<ListValue> beacons_value(new ListValue());
   for (BeaconConstIterator it = beacons_.begin(); it != beacons_.end(); ++it)
     beacons_value->Append(it->ToValue(upload_time, *last_network_change_time_));
 
@@ skipping 48 matching lines @@
 
   beacons_.pop_front();
 
   // If that just removed a beacon counted in uploading_beacons_size_, decrement
   // that.
   if (uploading_beacons_size_ > 0)
     --uploading_beacons_size_;
 }
 
 }  // namespace domain_reliability