Reviewed by Ken.

    Reviewed by Ken.

        - some small mechanical improvements to the position and selection classes

        * khtml/xml/dom_position.h: Added clear(), startPosition(), and endPosition().
        * khtml/xml/dom_position.cpp:
        (DOM::Position::clear): Added.
        (DOM::startPosition): Added.
        (DOM::endPosition): Added.

        * khtml/xml/dom_caretposition.h: Changed m_position to m_deepPosition. Added clear(),
        removed node() and offset().
        * khtml/xml/dom_caretposition.cpp:
        (DOM::CaretPosition::init): Updated for name change of m_position to m_deepPosition.
        (DOM::CaretPosition::isLastInBlock): Ditto.
        (DOM::CaretPosition::next): Ditto.
        (DOM::CaretPosition::previous): Ditto.
        (DOM::CaretPosition::debugPosition): Ditto.
        (DOM::CaretPosition::formatForDebugger): Ditto.

        * khtml/xml/dom_selection.h: Remove setStart, setEnd, setStartAndEnd, rangeStart, rangeEnd,
        and all the assignXXX functions.
        * khtml/xml/dom_selection.cpp:
        (DOM::Selection::Selection): Wean from assign functions, get and set data members directly.
        (DOM::Selection::init): Don't clear base, extent, start, and end, since they have constructors.
        (DOM::Selection::operator=): Wean from assign functions, get and set data members directly.
        (DOM::Selection::moveTo): Ditto.
        (DOM::Selection::setModifyBias): Ditto.
        (DOM::Selection::modifyExtendingRightForward): Ditto.
        (DOM::Selection::modifyMovingRightForward): Ditto.
        (DOM::Selection::modifyExtendingLeftBackward): Ditto.
        (DOM::Selection::modifyMovingLeftBackward): Ditto.
        (DOM::Selection::modify): Ditto.
        (DOM::Selection::xPosForVerticalArrowNavigation): Ditto.
        (DOM::Selection::clear): Ditto.
        (DOM::Selection::setBase): Ditto.
        (DOM::Selection::setExtent): Ditto.
        (DOM::Selection::setBaseAndExtent): Ditto.
        (DOM::Selection::toRange): Ditto.
        (DOM::Selection::layoutCaret): Ditto.
        (DOM::Selection::needsCaretRepaint): Ditto.
        (DOM::Selection::validate): Ditto.
        (DOM::Selection::debugRenderer): Ditto.
        (DOM::Selection::debugPosition): Ditto.
        (DOM::Selection::end):

        * kwq/KWQKHTMLPart.mm: (KWQKHTMLPart::advanceToNextMisspelling): Tweaked whitespace.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@7618 268f45cc-cd09-0410-ab3c-d52691b4dbfc