Stop passing const-reference of SWRegistration in all GetRegistrationsCallbacks.

content/browser/service_worker/service_worker_version.cc

Index: content/browser/service_worker/service_worker_version.cc
diff --git a/content/browser/service_worker/service_worker_version.cc b/content/browser/service_worker/service_worker_version.cc
index ed7ae82ea0a1579398af3bf3e96a88cdf88807ee..c9f14e5bbe052ee152eb13e47d1bef2323680fe7 100644
--- a/content/browser/service_worker/service_worker_version.cc
+++ b/content/browser/service_worker/service_worker_version.cc
@@ -1284,7 +1284,7 @@ void ServiceWorkerVersion::DidEnsureLiveRegistrationForStartWorker(
     bool is_browser_startup_complete,
     const StatusCallback& callback,
     ServiceWorkerStatusCode status,
-    const scoped_refptr<ServiceWorkerRegistration>& registration) {
+    scoped_refptr<ServiceWorkerRegistration> registration) {
   scoped_refptr<ServiceWorkerRegistration> protect = registration;
   if (status == SERVICE_WORKER_ERROR_NOT_FOUND) {
     // When the registration has already been deleted from the storage but its
@@ -1654,7 +1654,7 @@ void ServiceWorkerVersion::MarkIfStale() {
 
 void ServiceWorkerVersion::FoundRegistrationForUpdate(
     ServiceWorkerStatusCode status,
-    const scoped_refptr<ServiceWorkerRegistration>& registration) {
+    scoped_refptr<ServiceWorkerRegistration> registration) {
   if (!context_)
     return;