Reviewed by Ken.

    Reviewed by Ken.

        - rolled in a KDE fix for a problem that may underlie a number of crashes

        * khtml/xml/dom2_rangeimpl.cpp: (RangeImpl::compareBoundaryPoints): Rolled in a change from
        the KDE guys to fix a subtle problem. Code said "n = n =".

        - rolled in a KDE fix for a containingBlock crash

        * khtml/rendering/render_object.cpp: Roll in a change from KDE that adds frameset to the list of
        elements that can not be a containingBlock. They said this fixes a crash, although I did not look
        into that further.

        - fixed <rdar://problem/3884660> 8A305: Repro crash in QScrollBar::setValue (affects Safari RSS)

        * kwq/KWQButton.mm:
        (-[KWQButton initWithQButton:]): Set up target and action here instead of in caller.
        (-[KWQButton detachQButton]): Added.
        (-[KWQButton sendConsumedMouseUpIfNeeded]): Check button for nil instead of checking target.
        (-[KWQButton mouseDown:]): Add calls to QWidget::beforeMouseDown/afterMouseDown.
        (-[KWQButton widget]): Added.
        (-[KWQButton becomeFirstResponder]): Added check to handle when button is 0.
        (-[KWQButton resignFirstResponder]): Ditto.
        (-[KWQButton canBecomeKeyView]): Ditto.
        (QButton::QButton): Remove target and action setup; handled in KWQButton now.
        (QButton::~QButton): Call detachQButton instead of setTarget:nil.

        * kwq/KWQComboBox.mm:
        (QComboBox::~QComboBox): Call detachQComboBox.
        (-[KWQPopUpButtonCell detachQComboBox]): Added.
        (-[KWQPopUpButtonCell trackMouse:inRect:ofView:untilMouseUp:]): Handle case where box is 0.
        (-[KWQPopUpButtonCell setHighlighted:]): Ditto.
        (-[KWQPopUpButton action:]): Ditto.
        (-[KWQPopUpButton widget]): Tweaked.
        (-[KWQPopUpButton mouseDown:]): Added. Calls QWidget::beforeMouseDown/afterMouseDown.
        (-[KWQPopUpButton becomeFirstResponder]): Handle case where widget is 0.
        (-[KWQPopUpButton resignFirstResponder]): Ditto.
        (-[KWQPopUpButton canBecomeKeyView]): Ditto.

        * kwq/KWQLineEdit.mm: (QLineEdit::~QLineEdit): Updated to use new detachQLineEdit name.

        * kwq/KWQListBox.mm:
        (-[KWQTableView mouseDown:]): Added. Calls QWidget::beforeMouseDown/afterMouseDown.

        * kwq/KWQScrollBar.h: Removed m_scroller field.
        * kwq/KWQScrollBar.mm:
        (-[KWQScrollBar initWithQScrollBar:]): Rearranged a little bit.
        (-[KWQScrollBar detachQScrollBar]): Added.
        (-[KWQScrollBar widget]): Added.
        (-[KWQScrollBar mouseDown:]): Added.  Calls QWidget::beforeMouseDown and afterMouseDown.
        (QScrollBar::QScrollBar): Changed to no longer set m_scroller.
        (QScrollBar::~QScrollBar): Changed to call detachQScrollBar. No longer calls removeFromSuperview.
        (QScrollBar::setValue): Chagned to use getView instad of m_scrollBar.
        (QScrollBar::setKnobProportion): Ditto.
        (QScrollBar::scrollbarHit): Ditto.

        * kwq/KWQScrollView.mm:
        (QScrollView::addChild): Changed to call QWidget to add to superview to accomodate the
        hack where we don't remove right away when doing mouse tracking.
        (QScrollView::removeChild): Changed to call QWidget to remove from superview to accomodate
        the hack where we don't add right away when doing mouse tracking.

        * kwq/KWQSlider.h: Added destructor.
        * kwq/KWQSlider.mm:
        (-[KWQSlider initWithQSlider:]): Tweaked a little.
        (-[KWQSlider detachQSlider]): Added.
        (-[KWQSlider mouseDown:]): Added call to QWidget::beforeMouseDown/afterMouseDown.
        (-[KWQSlider widget]): Added.
        (QSlider::~QSlider): Added. Calls detachQSlider.

        * kwq/KWQTextArea.h: Added detachQTextEdit method.
        * kwq/KWQTextArea.mm:
        (-[KWQTextArea detachQTextEdit]): Added.
        (-[KWQTextArea textDidChange:]): Added check for widget of 0.
        (-[KWQTextArea becomeFirstResponder]): Ditto.
        (-[KWQTextArea nextKeyView]): Ditto.
        (-[KWQTextArea previousKeyView]): Ditto.
        (-[KWQTextArea drawRect:]): Ditto.
        (-[KWQTextAreaTextView insertTab:]): Ditto.
        (-[KWQTextAreaTextView insertBacktab:]): Ditto.
        (-[KWQTextAreaTextView shouldDrawInsertionPoint]): Ditto.
        (-[KWQTextAreaTextView selectedTextAttributes]): Ditto.
        (-[KWQTextAreaTextView mouseDown:]): Ditto.
        (-[KWQTextAreaTextView keyDown:]): Ditto.
        (-[KWQTextAreaTextView keyUp:]): Ditto.

        * kwq/KWQTextEdit.h: Added ~QTextEdit.
        * kwq/KWQTextEdit.mm: (QTextEdit::~QTextEdit): Added. Calls detachQTextEdit.

        * kwq/KWQTextField.h: Changed invalidate to detachQLineEdit.
        * kwq/KWQTextField.mm: (-[KWQTextFieldController detachQLineEdit]): Changed.

        * kwq/KWQWidget.h: Added addToSuperview/removeFromSuperview for use from QScrollView.
        Added beforeMouseDown and afterMouseDown for use in widget implementations.
        Removed unused hasMouseTracking function.
        * kwq/KWQWidget.mm:
        (QWidget::QWidget): Initialize two new fields.
        (QWidget::~QWidget): Added code to remove view when widget is destroyed.
        (QWidget::getOuterView): Remove unneeded exception blocking since we're just caling superview.
        (QWidget::addToSuperview): Added.
        (QWidget::removeFromSuperview): Added.
        (QWidget::beforeMouseDown): Added.
        (QWidget::afterMouseDown): Added.

        * khtml/rendering/render_layer.cpp:
        (RenderLayer::setHasHorizontalScrollbar): Remove parent parameter; let addChild call addSubview:.
        (RenderLayer::setHasVerticalScrollbar): Ditto.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@8090 268f45cc-cd09-0410-ab3c-d52691b4dbfc