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

content/renderer/renderer_blink_platform_impl.cc

 // Copyright (c) 2012 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/renderer/renderer_blink_platform_impl.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/command_line.h"
@@ skipping 24 matching lines @@
 #include "content/child/storage_util.h"
 #include "content/child/thread_safe_sender.h"
 #include "content/child/web_database_observer_impl.h"
 #include "content/child/web_url_loader_impl.h"
 #include "content/child/webfileutilities_impl.h"
 #include "content/child/webmessageportchannel_impl.h"
 #include "content/common/file_utilities_messages.h"
 #include "content/common/frame_messages.h"
 #include "content/common/gpu_stream_constants.h"
 #include "content/common/render_process_messages.h"
+#include "content/public/common/content_features.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/service_manager_connection.h"
 #include "content/public/common/webplugininfo.h"
 #include "content/public/renderer/content_renderer_client.h"
 #include "content/public/renderer/media_stream_utils.h"
 #include "content/public/renderer/render_frame.h"
 #include "content/renderer/cache_storage/webserviceworkercachestorage_impl.h"
 #include "content/renderer/device_sensors/device_motion_event_pump.h"
 #include "content/renderer/device_sensors/device_orientation_event_pump.h"
 #include "content/renderer/dom_storage/local_storage_cached_areas.h"
@@ skipping 249 matching lines @@
 }
 
 //------------------------------------------------------------------------------
 
 std::unique_ptr<blink::WebURLLoader> RendererBlinkPlatformImpl::CreateURLLoader(
     const blink::WebURLRequest& request,
     base::SingleThreadTaskRunner* task_runner) {
   ChildThreadImpl* child_thread = ChildThreadImpl::current();
 
   if (!url_loader_factory_ && child_thread) {
-    bool network_service_enabled =
-        base::CommandLine::ForCurrentProcess()->HasSwitch(
-            switches::kEnableNetworkService);
-    if (network_service_enabled) {
+    if (base::FeatureList::IsEnabled(features::kNetworkService)) {
       mojom::URLLoaderFactoryPtr factory_ptr;
       connector_->BindInterface(mojom::kBrowserServiceName, &factory_ptr);
       url_loader_factory_ = std::move(factory_ptr);
     } else {
       mojom::URLLoaderFactoryAssociatedPtr factory_ptr;
       child_thread->channel()->GetRemoteAssociatedInterface(&factory_ptr);
       url_loader_factory_ = std::move(factory_ptr);
     }
   }
 
@@ skipping 963 matching lines @@
 //------------------------------------------------------------------------------
 void RendererBlinkPlatformImpl::RequestPurgeMemory() {
   // TODO(tasak|bashi): We should use ChildMemoryCoordinator here, but
   // ChildMemoryCoordinator isn't always available as it's only initialized
   // when kMemoryCoordinatorV0 is enabled.
   // Use ChildMemoryCoordinator when memory coordinator is always enabled.
   base::MemoryCoordinatorClientRegistry::GetInstance()->PurgeMemory();
 }
 
 }  // namespace content