[DevTools] Rework DevToolsSession interaction with domain handlers.

content/browser/devtools/protocol/service_worker_handler.cc

 // Copyright 2015 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/devtools/protocol/service_worker_handler.h"
 
 #include "base/bind.h"
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 134 matching lines @@
                            bool last_chance) {
   context->FindReadyRegistrationForId(
       registration_id, origin,
       base::Bind(&DidFindRegistrationForDispatchSyncEventOnIO, sync_context,
                  tag, last_chance));
 }
 
 }  // namespace
 
 ServiceWorkerHandler::ServiceWorkerHandler()
-    : enabled_(false), render_frame_host_(nullptr), weak_factory_(this) {
+    : DevToolsDomainHandler(ServiceWorker::Metainfo::domainName),
+      enabled_(false),
+      render_frame_host_(nullptr),
+      weak_factory_(this) {
 }
 
 ServiceWorkerHandler::~ServiceWorkerHandler() {
 }
 
 void ServiceWorkerHandler::Wire(UberDispatcher* dispatcher) {
   frontend_.reset(new ServiceWorker::Frontend(dispatcher->channel()));
   ServiceWorker::Dispatcher::wire(dispatcher, this);
 }
 
@@ skipping 263 matching lines @@
           .Build());
 }
 
 void ServiceWorkerHandler::ClearForceUpdate() {
   if (context_)
     context_->SetForceUpdateOnPageLoad(false);
 }
 
 }  // namespace protocol
 }  // namespace content