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        Reviewed by Alexey Proskuryakov.

        REGRESSION: Crash in adjustMIMETypeIfNecessary since r81001
        https://bugs.webkit.org/show_bug.cgi?id=56345

        Add test that verifies the we don't crash when an XHR response headers don't contain
        Content-Type.

        * http/tests/xmlhttprequest/resources/.htaccess:
        * http/tests/xmlhttprequest/resources/noContentType.asis: Added.
        * http/tests/xmlhttprequest/xmlhttprequest-no-content-type-expected.txt: Added.
        * http/tests/xmlhttprequest/xmlhttprequest-no-content-type.html: Added.
2011-03-16  Pratik Solanki  <psolanki@apple.com>

        Reviewed by Alexey Proskuryakov.

        REGRESSION: Crash in adjustMIMETypeIfNecessary since r81001
        https://bugs.webkit.org/show_bug.cgi?id=56345

        Add NULL check for Content-Type header field.

        Test: http/tests/xmlhttprequest/xmlhttprequest-no-content-type.html

        * platform/network/mac/WebCoreURLResponse.mm:
        (WebCore::adjustMIMETypeIfNecessary):

git-svn-id: svn://svn.chromium.org/blink/trunk@81267 bbb929c8-8fbe-4397-9dbb-9b2b20218538