Move function for classifying a string as a mime type into MimeUtil

net/base/mime_util.h

 // Copyright (c) 2012 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 NET_BASE_MIME_UTIL_H__
 #define NET_BASE_MIME_UTIL_H__
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 40 matching lines @@
 
 // Convenience function.
 NET_EXPORT bool IsSupportedMimeType(const std::string& mime_type);
 
 // Returns true if this the mime_type_pattern matches a given mime-type.
 // Checks for absolute matching and wildcards.  mime-types should be in
 // lower case.
 NET_EXPORT bool MatchesMimeType(const std::string& mime_type_pattern,
                                 const std::string& mime_type);
 
+// Returns true if the |type_string| is a correctly-formed mime type specifier.
+// Allows strings of the form x/y[;params], where "x" is a legal mime type name.
+// Also allows wildcard types -- "x/*", "*/*", and "*".
+NET_EXPORT bool IsMimeType(const std::string& type_string);
+
 // Returns true if and only if all codecs are supported, false otherwise.
 NET_EXPORT bool AreSupportedMediaCodecs(const std::vector<std::string>& codecs);
 
 // Parses a codec string, populating |codecs_out| with the prefix of each codec
 // in the string |codecs_in|. For example, passed "aaa.b.c,dd.eee", if
 // |strip| == true |codecs_out| will contain {"aaa", "dd"}, if |strip| == false
 // |codecs_out| will contain {"aaa.b.c", "dd.eee"}.
 // See http://www.ietf.org/rfc/rfc4281.txt.
 NET_EXPORT void ParseCodecString(const std::string& codecs,
                                  std::vector<std::string>* codecs_out,
@@ skipping 44 matching lines @@
 // These types and codecs must be blacklisted to ensure consistent layout test
 // results across all Chromium variations.
 NET_EXPORT void GetMediaTypesBlacklistedForTests(
     std::vector<std::string>* types);
 NET_EXPORT void GetMediaCodecsBlacklistedForTests(
     std::vector<std::string>* codecs);
 
 }  // namespace net
 
 #endif  // NET_BASE_MIME_UTIL_H__