Return const references in the Blink SW API where possible

third_party/WebKit/Source/platform/exported/WebServiceWorkerRequest.cpp

 // 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 "public/platform/modules/serviceworker/WebServiceWorkerRequest.h"
 
 #include "platform/blob/BlobData.h"
 #include "platform/weborigin/KURL.h"
 #include "public/platform/WebHTTPHeaderVisitor.h"
 #include "public/platform/WebString.h"
@@ skipping 37 matching lines @@
 }
 
 void WebServiceWorkerRequest::assign(const WebServiceWorkerRequest& other) {
   m_private = other.m_private;
 }
 
 void WebServiceWorkerRequest::setURL(const WebURL& url) {
   m_private->m_url = url;
 }
 
-WebURL WebServiceWorkerRequest::url() const {
+const WebURL& WebServiceWorkerRequest::url() const {
   return m_private->m_url;
 }
 
 void WebServiceWorkerRequest::setMethod(const WebString& method) {
   m_private->m_method = method;
 }
 
-WebString WebServiceWorkerRequest::method() const {
+const WebString& WebServiceWorkerRequest::method() const {
   return m_private->m_method;
 }
 
 void WebServiceWorkerRequest::setHeader(const WebString& key,
                                         const WebString& value) {
   if (equalIgnoringCase(key, "referer"))
     return;
   m_private->m_headers.set(key, value);
 }
 
@@ skipping 99 matching lines @@
 }
 
 WebURLRequest::FrameType WebServiceWorkerRequest::frameType() const {
   return m_private->m_frameType;
 }
 
 void WebServiceWorkerRequest::setClientId(const WebString& clientId) {
   m_private->m_clientId = clientId;
 }
 
-WebString WebServiceWorkerRequest::clientId() const {
+const WebString& WebServiceWorkerRequest::clientId() const {
   return m_private->m_clientId;
 }
 
 void WebServiceWorkerRequest::setIsReload(bool isReload) {
   m_private->m_isReload = isReload;
 }
 
 bool WebServiceWorkerRequest::isReload() const {
   return m_private->m_isReload;
 }
 
 }  // namespace blink