| Index: Source/core/loader/FrameLoader.cpp | 
| diff --git a/Source/core/loader/FrameLoader.cpp b/Source/core/loader/FrameLoader.cpp | 
| index 7c0ad0ed34d4ffe16d94851b086c076075562474..a2537c1ef2b68a4a0a154a1bfe368fbcc5e80001 100644 | 
| --- a/Source/core/loader/FrameLoader.cpp | 
| +++ b/Source/core/loader/FrameLoader.cpp | 
| @@ -382,7 +382,7 @@ void FrameLoader::didBeginDocument(bool dispatch) | 
| } | 
|  | 
| if (m_documentLoader) { | 
| -        String dnsPrefetchControl = m_documentLoader->response().httpHeaderField("X-DNS-Prefetch-Control"); | 
| +        const AtomicString& dnsPrefetchControl = m_documentLoader->response().httpHeaderField("X-DNS-Prefetch-Control"); | 
| if (!dnsPrefetchControl.isEmpty()) | 
| m_frame->document()->parseDNSPrefetchControlHeader(dnsPrefetchControl); | 
|  | 
|  |