Reviewed by Ken Kocienda.

    Reviewed by Ken Kocienda.

		<rdar://problem/3865854> Deleting first line deletes all lines

        * khtml/editing/htmlediting.cpp:
        (khtml::DeleteSelectionCommand::performGeneralDelete):
        Problem was that the code that deletes fully selected m_downstreamEnd.node() by deleting one
        of its ancestors, failed to end the loop that deletes all fully selected nodes.  Also,
        fixed this code to clear m_trailingWhitespaceValid.  Also removed dead m_endingPosition
        update because it is handled in calculateEndingPosition now.
        * layout-tests/editing/deleting/delete-3865854-fix-expected.txt: Added.
        * layout-tests/editing/deleting/delete-3865854-fix.html: Added.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@7959 268f45cc-cd09-0410-ab3c-d52691b4dbfc