Stop passing const-reference of SWRegistration in all GetRegistrationsCallbacks.

content/browser/service_worker/service_worker_controllee_request_handler.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 "content/browser/service_worker/service_worker_controllee_request_handler.h"
 
 #include <memory>
 #include <set>
 #include <string>
 
@@ skipping 158 matching lines @@
   provider_host_->SetAllowAssociation(false);
 
   stripped_url_ = net::SimplifyUrlForRequest(request->url());
   provider_host_->SetDocumentUrl(stripped_url_);
   provider_host_->SetTopmostFrameUrl(request->first_party_for_cookies());
   context_->storage()->FindRegistrationForDocument(
       stripped_url_, base::Bind(&self::DidLookupRegistrationForMainResource,
                                 weak_factory_.GetWeakPtr()));
 }
 
-void
-ServiceWorkerControlleeRequestHandler::DidLookupRegistrationForMainResource(
-    ServiceWorkerStatusCode status,
-    const scoped_refptr<ServiceWorkerRegistration>& registration) {
+void ServiceWorkerControlleeRequestHandler::
+    DidLookupRegistrationForMainResource(
+        ServiceWorkerStatusCode status,
+        scoped_refptr<ServiceWorkerRegistration> registration) {
   // The job may have been canceled and then destroyed before this was invoked.
   if (!job_)
     return;
 
   const bool need_to_update = !force_update_started_ && registration &&
                               context_->force_update_on_page_load();
 
   if (provider_host_ && !need_to_update)
     provider_host_->SetAllowAssociation(true);
   if (status != SERVICE_WORKER_OK || !provider_host_ || !context_) {
@@ skipping 230 matching lines @@
   DCHECK(provider_host_);
   // Detach the controller so subresource requests also skip the worker.
   provider_host_->NotifyControllerLost();
 }
 
 void ServiceWorkerControlleeRequestHandler::ClearJob() {
   job_.reset();
 }
 
 }  // namespace content