Add a feature flag for network service and about:flags entry for it.

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 20 matching lines @@
 #include "content/common/origin_trials/trial_token_validator.h"
 #include "content/common/service_worker/embedded_worker_messages.h"
 #include "content/common/service_worker/embedded_worker_start_params.h"
 #include "content/common/service_worker/service_worker_messages.h"
 #include "content/common/service_worker/service_worker_utils.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/common/browser_side_navigation_policy.h"
 #include "content/public/common/content_client.h"
-#include "content/public/common/content_switches.h"
+#include "content/public/common/content_features.h"
 #include "content/public/common/result_codes.h"
 #include "net/http/http_response_headers.h"
 #include "net/http/http_response_info.h"
 #include "third_party/WebKit/public/web/WebConsoleMessage.h"
 
 namespace content {
 
 using StatusCallback = ServiceWorkerVersion::StatusCallback;
 
 namespace {
@@ skipping 850 matching lines @@
   OnStoppedInternal(old_status);
 }
 
 void ServiceWorkerVersion::OnScriptLoaded() {
   DCHECK(GetMainScriptHttpResponseInfo() ||
          // TODO(scottmg|falken): This DCHECK is currently triggered in
          // --network-service because ServiceWorkerReadFromCacheJob isn't being
          // used to retrieve the service worker js. This should be removed once
          // that's done.
          (IsBrowserSideNavigationEnabled() &&
-          base::CommandLine::ForCurrentProcess()->HasSwitch(
-              switches::kEnableNetworkService)));
+          base::FeatureList::IsEnabled(features::kNetworkService)));
   if (IsInstalled(status()))
     UMA_HISTOGRAM_BOOLEAN("ServiceWorker.ScriptLoadSuccess", true);
 }
 
 void ServiceWorkerVersion::OnScriptLoadFailed() {
   if (IsInstalled(status()))
     UMA_HISTOGRAM_BOOLEAN("ServiceWorker.ScriptLoadSuccess", false);
 }
 
 void ServiceWorkerVersion::OnRegisteredToDevToolsManager() {
@@ skipping 931 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