[Extensions] Migrate ServiceWorker off behavior feature system

extensions/renderer/dispatcher.cc

 // Copyright 2014 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 "extensions/renderer/dispatcher.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/command_line.h"
@@ skipping 1051 matching lines @@
                                  const std::string& module_name,
                                  const std::string& function_name,
                                  const base::ListValue& args,
                                  bool user_gesture) {
   InvokeModuleSystemMethod(
       NULL, extension_id, module_name, function_name, args, user_gesture);
 }
 
 void Dispatcher::OnSetChannel(int channel) {
   delegate_->SetChannel(channel);
-  AddChannelSpecificFeatures();
 }
 
 void Dispatcher::OnSetScriptingWhitelist(
     const ExtensionsClient::ScriptingWhitelist& extension_ids) {
   ExtensionsClient::Get()->SetScriptingWhitelist(extension_ids);
 }
 
 void Dispatcher::OnSetSystemFont(const std::string& font_family,
                                  const std::string& font_size) {
   system_font_family_ = font_family;
@@ skipping 510 matching lines @@
 
   // The "guestViewDeny" module must always be loaded last. It registers
   // error-providing custom elements for the GuestView types that are not
   // available, and thus all of those types must have been checked and loaded
   // (or not loaded) beforehand.
   if (context_type == Feature::BLESSED_EXTENSION_CONTEXT) {
     module_system->Require("guestViewDeny");
   }
 }
 
-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