Stop passing const-reference of SWRegistration in all GetRegistrationsCallbacks.

content/browser/service_worker/foreign_fetch_request_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/service_worker/foreign_fetch_request_handler.h"
 
 #include <string>
 
 #include "base/macros.h"
 #include "content/browser/service_worker/service_worker_context_wrapper.h"
@@ skipping 156 matching lines @@
       credentials_mode_(credentials_mode),
       redirect_mode_(redirect_mode),
       request_context_type_(request_context_type),
       frame_type_(frame_type),
       body_(body),
       weak_factory_(this) {}
 
 void ForeignFetchRequestHandler::DidFindRegistration(
     const base::WeakPtr<ServiceWorkerURLRequestJob>& job,
     ServiceWorkerStatusCode status,
-    const scoped_refptr<ServiceWorkerRegistration>& registration) {
+    scoped_refptr<ServiceWorkerRegistration> registration) {
   if (!job || job.get() != job_.get()) {
     // No more job to handle, or job changed somehow, so just return.
     return;
   }
 
   if (status != SERVICE_WORKER_OK || !job->request()) {
     job->FallbackToNetwork();
     return;
   }
 
@@ skipping 40 matching lines @@
   }
   return target_worker_.get();
 }
 
 void ForeignFetchRequestHandler::ClearJob() {
   job_.reset();
   target_worker_ = nullptr;
 }
 
 }  // namespace content