Add UMA for how long service workers run for.

content/browser/service_worker/embedded_worker_registry.cc

 // Copyright 2013 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 "content/browser/service_worker/embedded_worker_registry.h"
 
 #include "base/bind_helpers.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/stl_util.h"
 #include "content/browser/renderer_host/render_widget_helper.h"
@@ skipping 122 matching lines @@
       GetWorkerForMessage(process_id, embedded_worker_id);
   if (!worker)
     return;
 
   if (!base::ContainsKey(worker_process_map_, process_id) ||
       !base::ContainsKey(worker_process_map_[process_id], embedded_worker_id)) {
     return;
   }
 
   worker->OnStarted();
+  lifetime_tracker_.StartTiming(embedded_worker_id);
 }
 
 void EmbeddedWorkerRegistry::OnWorkerStopped(
     int process_id, int embedded_worker_id) {
   EmbeddedWorkerInstance* worker =
       GetWorkerForMessage(process_id, embedded_worker_id);
   if (!worker)
     return;
   worker_process_map_[process_id].erase(embedded_worker_id);
   worker->OnStopped();
+  lifetime_tracker_.StopTiming(embedded_worker_id);
 }
 
 void EmbeddedWorkerRegistry::OnReportException(
     int embedded_worker_id,
     const base::string16& error_message,
     int line_number,
     int column_number,
     const GURL& source_url) {
   EmbeddedWorkerInstance* worker = GetWorker(embedded_worker_id);
   if (!worker)
     return;
   worker->OnReportException(error_message, line_number, column_number,
                             source_url);
 }
 
 void EmbeddedWorkerRegistry::OnReportConsoleMessage(
     int embedded_worker_id,
     int source_identifier,
     int message_level,
     const base::string16& message,
     int line_number,
     const GURL& source_url) {
   EmbeddedWorkerInstance* worker = GetWorker(embedded_worker_id);
   if (!worker)
     return;
   worker->OnReportConsoleMessage(source_identifier, message_level, message,
                                  line_number, source_url);
 }
 
+void EmbeddedWorkerRegistry::OnDevToolsAttached(int embedded_worker_id) {
+  lifetime_tracker_.AbortTiming(embedded_worker_id);
+}
+
 void EmbeddedWorkerRegistry::RemoveProcess(int process_id) {
   std::map<int, std::set<int> >::iterator found =
       worker_process_map_.find(process_id);
   if (found != worker_process_map_.end()) {
     const std::set<int>& worker_set = worker_process_map_[process_id];
     for (std::set<int>::const_iterator it = worker_set.begin();
          it != worker_set.end();
          ++it) {
       int embedded_worker_id = *it;
       DCHECK(base::ContainsKey(worker_map_, embedded_worker_id));
@@ skipping 70 matching lines @@
 }
 
 void EmbeddedWorkerRegistry::DetachWorker(int process_id,
                                           int embedded_worker_id) {
   DCHECK(base::ContainsKey(worker_map_, embedded_worker_id));
   if (!base::ContainsKey(worker_process_map_, process_id))
     return;
   worker_process_map_[process_id].erase(embedded_worker_id);
   if (worker_process_map_[process_id].empty())
     worker_process_map_.erase(process_id);
+  lifetime_tracker_.StopTiming(embedded_worker_id);
 }
 
 EmbeddedWorkerInstance* EmbeddedWorkerRegistry::GetWorkerForMessage(
     int process_id,
     int embedded_worker_id) {
   EmbeddedWorkerInstance* worker = GetWorker(embedded_worker_id);
   if (!worker || worker->process_id() != process_id) {
     UMA_HISTOGRAM_BOOLEAN("ServiceWorker.WorkerForMessageFound", false);
     return nullptr;
   }
   UMA_HISTOGRAM_BOOLEAN("ServiceWorker.WorkerForMessageFound", true);
   return worker;
 }
 
 }  // namespace content