Revert of [Extensions] Migrate ServiceWorker off behavior feature system

extensions/renderer/dispatcher.cc

Index: extensions/renderer/dispatcher.cc
diff --git a/extensions/renderer/dispatcher.cc b/extensions/renderer/dispatcher.cc
index 7f3a28f9c9eb59daa8517ec2869169e4885d5aa7..fa73ccc26163ac80378e6e857fc7ce98d3ae55ae 100644
--- a/extensions/renderer/dispatcher.cc
+++ b/extensions/renderer/dispatcher.cc
@@ -1069,6 +1069,7 @@
 
 void Dispatcher::OnSetChannel(int channel) {
   delegate_->SetChannel(channel);
+  AddChannelSpecificFeatures();
 }
 
 void Dispatcher::OnSetScriptingWhitelist(
@@ -1599,4 +1600,13 @@
   }
 }
 
+void Dispatcher::AddChannelSpecificFeatures() {
+  // chrome-extension: resources should be allowed to register a Service Worker.
+  if (FeatureProvider::GetBehaviorFeature(BehaviorFeature::kServiceWorker)
+          ->IsAvailableToEnvironment()
+          .is_available())
+    WebSecurityPolicy::registerURLSchemeAsAllowingServiceWorkers(
+        WebString::fromUTF8(kExtensionScheme));
+}
+
 }  // namespace extensions