Add UMA for how long service workers run for.

content/browser/service_worker/service_worker_version.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/service_worker_version.h"
 
 #include <stddef.h>
 
 #include <limits>
 #include <map>
@@ skipping 732 matching lines @@
   context_->storage()->PurgeResources(resources);
 }
 
 void ServiceWorkerVersion::SetValidOriginTrialTokens(
     const TrialTokenValidator::FeatureToTokensMap& tokens) {
   origin_trial_tokens_ =
       TrialTokenValidator::GetValidTokens(url::Origin(scope()), tokens);
 }
 
 void ServiceWorkerVersion::SetDevToolsAttached(bool attached) {
-  embedded_worker()->set_devtools_attached(attached);
+  embedded_worker()->SetDevToolsAttached(attached);
+
   if (stop_when_devtools_detached_ && !attached) {
     DCHECK_EQ(REDUNDANT, status());
     if (running_status() == EmbeddedWorkerStatus::STARTING ||
         running_status() == EmbeddedWorkerStatus::RUNNING) {
       embedded_worker_->Stop();
     }
     return;
   }
   if (attached) {
     // TODO(falken): Canceling the timeouts when debugging could cause
@@ skipping 1135 matching lines @@
 
 void ServiceWorkerVersion::CleanUpExternalRequest(
     const std::string& request_uuid,
     ServiceWorkerStatusCode status) {
   if (status == SERVICE_WORKER_OK)
     return;
   external_request_uuid_to_request_id_.erase(request_uuid);
 }
 
 }  // namespace content