Archive loading should be case insensitive to mimetype "multipart/related"

Source/platform/mhtml/MHTMLParser.cpp

 /*
  * Copyright (C) 2011 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 47 matching lines @@
         QuotedPrintable,
         Base64,
         EightBit,
         SevenBit,
         Binary,
         Unknown
     };
 
     static PassRefPtrWillBeRawPtr<MIMEHeader> parseHeader(SharedBufferChunkReader* crLFLineReader);
 
-    bool isMultipart() const { return m_contentType.startsWith("multipart/"); }
+    bool isMultipart() const { return m_contentType.lower().startsWith("multipart/"); }

[sof, 2015/04/06 05:27:36]

startsWith() takes an optional 2nd arg controlling case sensitivity,

  <...>.startsWith("multipart/", TextCaseInsensitive);

 
     String contentType() const { return m_contentType; }
     String charset() const { return m_charset; }
     Encoding contentTransferEncoding() const { return m_contentTransferEncoding; }
     String contentLocation() const { return m_contentLocation; }
 
     // Multi-part type and boundaries are only valid for multipart MIME headers.
     String multiPartType() const { return m_multipartType; }
     String endOfPartBoundary() const { return m_endOfPartBoundary; }
     String endOfDocumentBoundary() const { return m_endOfDocumentBoundary; }
@@ skipping 307 matching lines @@
 {
     return m_resources.size();
 }
 
 ArchiveResource* MHTMLParser::subResourceAt(size_t index) const
 {
     return m_resources[index].get();
 }
 
 } // namespace blink