Return const references in the Blink SW API where possible

third_party/WebKit/public/platform/modules/serviceworker/WebServiceWorkerResponse.h

 // 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.
 
 #ifndef WebServiceWorkerResponse_h
 #define WebServiceWorkerResponse_h
 
 #include "public/platform/WebCommon.h"
 #include "public/platform/WebPrivatePtr.h"
 #include "public/platform/WebString.h"
@@ skipping 33 matching lines @@
   void reset();
   void assign(const WebServiceWorkerResponse&);
 
   void setURLList(const WebVector<WebURL>&);
   const WebVector<WebURL>& urlList() const;
 
   void setStatus(unsigned short);
   unsigned short status() const;
 
   void setStatusText(const WebString&);
-  WebString statusText() const;
+  const WebString& statusText() const;
 
   void setResponseType(WebServiceWorkerResponseType);
   WebServiceWorkerResponseType responseType() const;
 
   void setHeader(const WebString& key, const WebString& value);
 
   // If the key already exists, appends the value to the same key (comma
   // delimited) else creates a new entry.
   void appendHeader(const WebString& key, const WebString& value);
 
   WebVector<WebString> getHeaderKeys() const;
   WebString getHeader(const WebString& key) const;
   void visitHTTPHeaderFields(WebHTTPHeaderVisitor*) const;
 
   void setBlob(const WebString& uuid, uint64_t size);
   WebString blobUUID() const;
   uint64_t blobSize() const;
 
   void setStreamURL(const WebURL&);
-  WebURL streamURL() const;
+  const WebURL& streamURL() const;
 
   // Provides a more detailed error when status() is zero.
   void setError(WebServiceWorkerResponseError);
   WebServiceWorkerResponseError error() const;
 
   void setResponseTime(int64_t);
   int64_t responseTime() const;
 
   void setCacheStorageCacheName(const WebString&);
-  WebString cacheStorageCacheName() const;
+  const WebString& cacheStorageCacheName() const;
 
   void setCorsExposedHeaderNames(const WebVector<WebString>&);
-  WebVector<WebString> corsExposedHeaderNames() const;
+  const WebVector<WebString>& corsExposedHeaderNames() const;
 
 #if INSIDE_BLINK
   const HTTPHeaderMap& headers() const;
 
   void setBlobDataHandle(PassRefPtr<BlobDataHandle>);
   PassRefPtr<BlobDataHandle> blobDataHandle() const;
 #endif
 
  private:
   WebPrivatePtr<WebServiceWorkerResponsePrivate> m_private;
 };
 
 }  // namespace blink
 
 #endif  // WebServiceWorkerResponse_h