Reviewed by Adele.

    Reviewed by Adele.

        - fix <rdar://problem/4484787> KWQAccObject dangles under GC

        * kwq/AccessibilityObjectCache.h: Moved AccessibilityObjectCache into the WebCore
        namespace. Renamed accObject to get, removed setAccObject, renamed removeAccObject
        to remove, removed getAccObjectID, renamed removeAXObjectID to removeAXID, change
        from CF dictionaries to HashMap and HashSet.
        * kwq/AccessibilityObjectCache.mm:
        (WebCore::AccessibilityObjectCache::~AccessibilityObjectCache): Detach all objects
        and call CFRelease on all of them.
        (WebCore::AccessibilityObjectCache::get): Call CFRetain on objects before putting
        them in the HashMap, rather than assuming that retain == CFRetain. This is what
        fixes the GC issue.
        (WebCore::AccessibilityObjectCache::remove): Detach and call CFRelease when removing.
        (WebCore::AccessibilityObjectCache::getAXID): Change to use a single global variable
        for the AXIDs, which makes it so we won't reuse the same AXID as much as we did before.
        (WebCore::AccessibilityObjectCache::removeAXID): Updated to use HashSet.
        (WebCore::AccessibilityObjectCache::textMarkerForVisiblePosition): Updated for other changes.
        (WebCore::AccessibilityObjectCache::visiblePositionForTextMarker): Ditto.
        (WebCore::AccessibilityObjectCache::childrenChanged): Ditto.
        (WebCore::AccessibilityObjectCache::postNotificationToTopWebArea): Ditto.
        (WebCore::AccessibilityObjectCache::postNotification): Ditto.

        * bridge/mac/WebCoreFrameBridge.mm: (-[WebCoreFrameBridge accessibilityTree]):
        Change to use functions by new names.

        * dom/Document.h: AccessibilityObjectCache is now in the WebCore namespace.
        getAccObjectCache and ownerElement are const member functions, and m_accCache
        is a mutable data member.
        * dom/Document.cpp:
        (WebCore::Document::getAccObjectCache): Make const.
        (WebCore::Document::ownerElement): Make const.

        * kwq/WebCoreAXObject.h: Changed WebCoreAXID to WebCore::AXID.
        * kwq/WebCoreAXObject.mm:
        (-[WebCoreAXObject anchorElement]): Update for function name change.
        (-[WebCoreAXObject firstChild]): Ditto.
        (-[WebCoreAXObject lastChild]): Ditto.
        (-[WebCoreAXObject previousSibling]): Ditto.
        (-[WebCoreAXObject nextSibling]): Ditto.
        (-[WebCoreAXObject parentObject]): Ditto.
        (-[WebCoreAXObject accessibilityAttributeValue:]): Ditto.
        (-[WebCoreAXObject doAXUIElementForTextMarker:]): Ditto.
        (AXLinkElementForNode): Ditto.
        (AXAttributedStringAppendReplaced): Ditto.
        (-[WebCoreAXObject accessibilityHitTest:]): Ditto.
        (-[WebCoreAXObject _accessibilityParentForSubview:]): Ditto.
        (-[WebCoreAXObject accessibilityFocusedUIElement]): Ditto.
        (-[WebCoreAXObject axObjectID]): Change field name to m_id.
        (-[WebCoreAXObject setAXObjectID:]): Ditto.
        (-[WebCoreAXObject removeAXObjectID]): Ditto.

        * rendering/RenderContainer.cpp:
        (WebCore::RenderContainer::removeChildNode): Remove ifdefs.
        (WebCore::RenderContainer::appendChildNode): Ditto.
        (WebCore::RenderContainer::insertChildNode): Ditto.
        * rendering/RenderObject.cpp: (WebCore::RenderObject::remove): Ditto.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@13467 268f45cc-cd09-0410-ab3c-d52691b4dbfc