ServiceWorker: More accurate StartWorker result and UMA

content/browser/service_worker/service_worker_register_job.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_register_job.h"
 
 #include <vector>
 
 #include "base/message_loop/message_loop.h"
 #include "content/browser/service_worker/service_worker_context_core.h"
@@ skipping 432 matching lines @@
 
 void ServiceWorkerRegisterJob::CompleteInternal(
     ServiceWorkerStatusCode status,
     const std::string& status_message) {
   SetPhase(COMPLETE);
   if (status != SERVICE_WORKER_OK) {
     if (registration()) {
       if (should_uninstall_on_failure_)
         registration()->ClearWhenReady();
       if (new_version()) {
-        if (status != SERVICE_WORKER_ERROR_EXISTS)
+        if (status == SERVICE_WORKER_ERROR_EXISTS)
+          new_version()->SetStartWorkerStatusCode(SERVICE_WORKER_ERROR_EXISTS);
+        else
           new_version()->ReportError(status, status_message);
         registration()->UnsetVersion(new_version());
         new_version()->Doom();
       }
       if (!registration()->waiting_version() &&
           !registration()->active_version()) {
         registration()->NotifyRegistrationFailed();
         context_->storage()->DeleteRegistration(
             registration()->id(),
             registration()->pattern().GetOrigin(),
@@ skipping 89 matching lines @@
     if (host->IsHostToRunningServiceWorker())
       continue;
     if (!ServiceWorkerUtils::ScopeMatches(registration->pattern(),
                                           host->document_url()))
       continue;
     host->AddMatchingRegistration(registration);
   }
 }
 
 }  // namespace content