Reporting top cpu and memory consumers via rappor on chromeos

components/metrics/metrics_service.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.
 
 //------------------------------------------------------------------------------
 // Description of the life cycle of a instance of MetricsService.
 //
 //  OVERVIEW
 //
 // A MetricsService instance is typically created at application startup.  It is
@@ skipping 317 matching lines @@
           // MetricsServiceClient outlives MetricsService, and
           // MetricsReportingScheduler is tied to the lifetime of |this|.
           base::Bind(&MetricsServiceClient::GetStandardUploadInterval,
                      base::Unretained(client_))));
 }
 
 void MetricsService::Start() {
   HandleIdleSinceLastTransmission(false);
   EnableRecording();
   EnableReporting();
+
+  FOR_EACH_OBSERVER(MetricsServiceObserver,
+                    metrics_service_observer_list_,
+                    OnMetricsServiceStart());
 }
 
 void MetricsService::StartRecordingForTests() {
   test_mode_active_ = true;
   EnableRecording();
   DisableReporting();
 }
 
 void MetricsService::Stop() {
+  FOR_EACH_OBSERVER(MetricsServiceObserver,
+                    metrics_service_observer_list_,
+                    OnMetricsServiceStop());
+
   HandleIdleSinceLastTransmission(false);
   DisableReporting();
   DisableRecording();
 }
 
 void MetricsService::EnableReporting() {
   if (reporting_active_)
     return;
   reporting_active_ = true;
   StartSchedulerIfNecessary();
@@ skipping 672 matching lines @@
   synthetic_trial_observer_list_.AddObserver(observer);
   if (!synthetic_trial_groups_.empty())
     observer->OnSyntheticTrialsChanged(synthetic_trial_groups_);
 }
 
 void MetricsService::RemoveSyntheticTrialObserver(
     SyntheticTrialObserver* observer) {
   synthetic_trial_observer_list_.RemoveObserver(observer);
 }
 
+void MetricsService::AddObserver(MetricsServiceObserver* observer) {
+  metrics_service_observer_list_.AddObserver(observer);
+}
+
+void MetricsService::RemoveObserver(MetricsServiceObserver* observer) {
+  metrics_service_observer_list_.RemoveObserver(observer);
+}
+
 void MetricsService::RegisterSyntheticFieldTrial(
     const SyntheticTrialGroup& trial) {
   for (size_t i = 0; i < synthetic_trial_groups_.size(); ++i) {
     if (synthetic_trial_groups_[i].id.name == trial.id.name) {
       if (synthetic_trial_groups_[i].id.group != trial.id.group) {
         synthetic_trial_groups_[i].id.group = trial.id.group;
         synthetic_trial_groups_[i].start_time = base::TimeTicks::Now();
         NotifySyntheticTrialObservers();
       }
       return;
@@ skipping 89 matching lines @@
                  base::Time::Now().ToTimeT());
 }
 
 void MetricsService::SkipAndDiscardUpload() {
   log_manager_.DiscardStagedLog();
   scheduler_->UploadCancelled();
   log_upload_in_progress_ = false;
 }
 
 }  // namespace metrics