Reviewed by Hyatt

    Reviewed by Hyatt

        * khtml/editing/htmlediting_impl.cpp:
        (DeleteSelectionCommandImpl::containsOnlyWhitespace): New helper.
        (DeleteSelectionCommandImpl::doApply): Fix deleting collapsed whitespace at the end of a line
        where text has flowed to the next line and the caret is at the beginning of the next line.
        * khtml/editing/htmlediting_impl.h: Updated for new helper.
        * layout-tests/editing/deleting/delete-line-end-ws-001-expected.txt: Added.
        * layout-tests/editing/deleting/delete-line-end-ws-001.html: Added.
        * layout-tests/editing/deleting/delete-line-end-ws-002-expected.txt: Added.
        * layout-tests/editing/deleting/delete-line-end-ws-002.html: Added.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@6408 268f45cc-cd09-0410-ab3c-d52691b4dbfc