Stop ignoring whitespaces in the middle of MIME type in a Content-Type header

third_party/WebKit/Source/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 87 matching lines @@
 PLATFORM_EXPORT bool isValidHTTPFieldContentRFC7230(const String&);
 PLATFORM_EXPORT bool isValidHTTPToken(const String&);
 // |matcher| specifies a function to check a whitespace character. if |nullptr|
 // is specified, ' ' and '\t' are treated as whitespace characters.
 PLATFORM_EXPORT bool parseHTTPRefresh(const String& refresh, WTF::CharacterMatchFunctionPtr matcher, double& delay, String& url);
 PLATFORM_EXPORT double parseDate(const String&);
 
 // Given a Media Type (like "foo/bar; baz=gazonk" - usually from the
 // 'Content-Type' HTTP header), extract and return the "type/subtype" portion
 // ("foo/bar").
-// Note: This function does not in any way check that the "type/subtype" pair
-// is well-formed.
+//
+// Note:
+// - This function does not in any way check that the "type/subtype" pair
+//   is well-formed.
+// - OWSes at the head and the tail of the region before the first semicolon
+//   are trimmed.
 PLATFORM_EXPORT AtomicString extractMIMETypeFromMediaType(const AtomicString&);
 PLATFORM_EXPORT String extractCharsetFromMediaType(const String&);
 PLATFORM_EXPORT void findCharsetInMediaType(const String& mediaType, unsigned& charsetPos, unsigned& charsetLen, unsigned start = 0);
 PLATFORM_EXPORT ReflectedXSSDisposition parseXSSProtectionHeader(const String& header, String& failureReason, unsigned& failurePosition, String& reportURL);
 PLATFORM_EXPORT XFrameOptionsDisposition parseXFrameOptionsHeader(const String&);
 PLATFORM_EXPORT CacheControlHeader parseCacheControlDirectives(const AtomicString& cacheControlHeader, const AtomicString& pragmaHeader);
 PLATFORM_EXPORT void parseCommaDelimitedHeader(const String& headerValue, CommaDelimitedHeaderSet&);
 // Returns true on success, otherwise false. The Suborigin argument must be a
 // non-null return argument. |messages| is a list of messages based on any
 // parse warnings or errors. Even if parseSuboriginHeader returns true, there
 // may be Strings in |messages|.
 PLATFORM_EXPORT bool parseSuboriginHeader(const String& header, Suborigin*, WTF::Vector<String>& messages);
 
 PLATFORM_EXPORT ContentTypeOptionsDisposition parseContentTypeOptionsHeader(const String& header);
 
 } // namespace blink
 
 #endif