[MediaRouter] Record DIAL device counts in DialMediaSinkServiceImpl

chrome/browser/media/router/discovery/media_sink_service_base.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 "chrome/browser/media/router/discovery/media_sink_service_base.h"
 
 #include <vector>
 
 namespace {
 // Time interval when media sink service sends sinks to MRP.
 const int kFetchCompleteTimeoutSecs = 3;
@@ skipping 19 matching lines @@
 
   if (current_sinks_ == mrp_sinks_) {
     DVLOG(2) << "No update to sink list.";
     return;
   }
 
   DVLOG(2) << "Send sinks to media router, [size]: " << current_sinks_.size();
   sink_discovery_callback_.Run(std::vector<MediaSinkInternal>(
       current_sinks_.begin(), current_sinks_.end()));
   mrp_sinks_ = current_sinks_;
+
+  RecordDeviceCounts();
 }
 
 void MediaSinkServiceBase::StartTimer() {
   // Create a finish timer.
   if (!finish_timer_)
     finish_timer_.reset(new base::OneShotTimer());
 
   base::TimeDelta finish_delay =
       base::TimeDelta::FromSeconds(fetch_complete_timeout_secs_);
   finish_timer_->Start(FROM_HERE, finish_delay,
                        base::Bind(&MediaSinkServiceBase::OnFetchCompleted,
                                   base::Unretained(this)));
 }
 
 void MediaSinkServiceBase::StopTimer() {
   finish_timer_.reset();
 }
 
 void MediaSinkServiceBase::RestartTimer() {
   if (!finish_timer_ || finish_timer_->IsRunning())
     return;
   StartTimer();
 }
 
 }  // namespace media_router