Reviewed by John Sullivan.

        <rdar://problem/4598149> Deleting the contents of a DOMRange and then inserting a node into it crashes in WebCore::Font::canUseGlyphCache

        * fast/dom/delete-contents-expected.checksum: Added.
        * fast/dom/delete-contents-expected.png: Added.
        * fast/dom/delete-contents-expected.txt: Added.
        * fast/dom/delete-contents.html: Added.

WebCore:

        Reviewed by John Sullivan.

        <rdar://problem/4598149> Deleting the contents of a DOMRange and then inserting a node into it crashes in WebCore::Font::canUseGlyphCache

        Test: fast/dom/delete-contents.html
        
        * dom/Range.cpp:
        (WebCore::Range::processContents):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@15270 268f45cc-cd09-0410-ab3c-d52691b4dbfc