Remove the ENABLE_NOSNIFF compile-time flag.

Source/WebCore/platform/network/HTTPParsers.h

 /*
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2011 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 29 matching lines @@
 class HTTPHeaderMap;
 class ResourceResponseBase;
 
 typedef enum {
     ContentDispositionNone,
     ContentDispositionInline,
     ContentDispositionAttachment,
     ContentDispositionOther
 } ContentDispositionType;
 
-#if ENABLE(NOSNIFF)
 enum ContentTypeOptionsDisposition {
     ContentTypeOptionsNone,
     ContentTypeOptionsNosniff
 };
-#endif
 
 enum XFrameOptionsDisposition {
     XFrameOptionsNone,
     XFrameOptionsDeny,
     XFrameOptionsSameOrigin,
     XFrameOptionsAllowAll,
     XFrameOptionsInvalid,
     XFrameOptionsConflict
 };
 
 ContentDispositionType contentDispositionType(const String&);
 bool isValidHTTPHeaderValue(const String&);
 bool isValidHTTPToken(const String&);
 bool parseHTTPRefresh(const String& refresh, bool fromHttpEquivMeta, double& delay, String& url);
 double parseDate(const String&);
 String filenameFromHTTPContentDisposition(const String&); 
 String extractMIMETypeFromMediaType(const String&);
 String extractCharsetFromMediaType(const String&); 
 void findCharsetInMediaType(const String& mediaType, unsigned int& charsetPos, unsigned int& charsetLen, unsigned int start = 0);
 ContentSecurityPolicy::ReflectedXSSDisposition parseXSSProtectionHeader(const String& header, String& failureReason, unsigned& failurePosition, String& reportURL);
 String extractReasonPhraseFromHTTPStatusLine(const String&);
 XFrameOptionsDisposition parseXFrameOptionsHeader(const String&);
 
 // -1 could be set to one of the return parameters to indicate the value is not specified.
 bool parseRange(const String&, long long& rangeOffset, long long& rangeEnd, long long& rangeSuffixLength);
 
-#if ENABLE(NOSNIFF)
 ContentTypeOptionsDisposition parseContentTypeOptionsHeader(const String& header);
-#endif
 
 // Parsing Complete HTTP Messages.
 enum HTTPVersion { Unknown, HTTP_1_0, HTTP_1_1 };
 size_t parseHTTPRequestLine(const char* data, size_t length, String& failureReason, String& method, String& url, HTTPVersion&);
 size_t parseHTTPHeader(const char* data, size_t length, String& failureReason, AtomicString& nameStr, String& valueStr);
 size_t parseHTTPRequestBody(const char* data, size_t length, Vector<unsigned char>& body);
 
 }
 
 #endif