"<rdar://problem/4064017> Safari crashes at -[WebCoreBridge firstRectForDOMRange:] + 92"

        * khtml/editing/delete_selection_command.cpp:
        (khtml::DeleteSelectionCommand::insertPlaceholderForAncestorBlockContent):
        Do not insert placeholder if selection ends at a BR.

        (khtml::DeleteSelectionCommand::handleGeneralDelete):
        No need to preserve starting BR because insertPlaceholderForAncestorBlockContent already did.

        * khtml/xml/dom_position.cpp:
        (DOM::Position::upstream):
        (DOM::Position::downstream):
        Fixed to return original position instead of invisible position when no suitable position found upstream.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@10786 268f45cc-cd09-0410-ab3c-d52691b4dbfc