Remove Scrollbar dependency on AXObjectCache

Source/core/platform/Scrollbar.cpp

 /*
  * Copyright (C) 2004, 2006, 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 15 matching lines @@
 #include "config.h"
 #include "core/platform/Scrollbar.h"
 
 #include <algorithm>
 #include "core/platform/ScrollAnimator.h"
 #include "core/platform/ScrollableArea.h"
 #include "core/platform/ScrollbarTheme.h"
 #include "core/platform/graphics/GraphicsContext.h"
 
 // FIXME: The following #includes are a layering violation and should be removed.
-#include "core/accessibility/AXObjectCache.h"
 #include "core/page/EventHandler.h"
 #include "core/frame/Frame.h"
 #include "core/frame/FrameView.h"
 
 #include "platform/PlatformGestureEvent.h"
 #include "platform/PlatformMouseEvent.h"
 
 using namespace std;
 
 #if OS(POSIX) && !OS(MACOSX)
@@ skipping 39 matching lines @@
     // scrollbar thickness and use it when sizing scrollbars (rather than leaving one dimension of the scrollbar
     // alone when sizing).
     int thickness = m_theme->scrollbarThickness(controlSize);
     Widget::setFrameRect(IntRect(0, 0, thickness, thickness));
 
     m_currentPos = scrollableAreaCurrentPos();
 }
 
 Scrollbar::~Scrollbar()
 {
-    if (AXObjectCache* cache = existingAXObjectCache())
-        cache->remove(this);
-
     stopTimerIfNeeded();
 
     m_theme->unregisterScrollbar(this);
 }
 
 void Scrollbar::removeFromParent()
 {
     if (parent())
         toScrollView(parent())->removeChild(this);
 }
@@ skipping 442 matching lines @@
     if (!isOverlayScrollbar())
         return true;
     return m_scrollableArea->scrollAnimator()->shouldScrollbarParticipateInHitTesting(this);
 }
 
 bool Scrollbar::isWindowActive() const
 {
     return m_scrollableArea && m_scrollableArea->isActive();
 }
 
-AXObjectCache* Scrollbar::existingAXObjectCache() const
-{
-    if (!parentScrollView())
-        return 0;
-
-    return parentScrollView()->axObjectCache();
-}
-
 void Scrollbar::invalidateRect(const IntRect& rect)
 {
     if (suppressInvalidation())
         return;
 
     if (m_scrollableArea)
         m_scrollableArea->invalidateScrollbar(this, rect);
 }
 
 IntRect Scrollbar::convertToContainingView(const IntRect& localRect) const
@@ skipping 33 matching lines @@
     if (!m_scrollableArea)
         return 0;
 
     if (m_orientation == HorizontalScrollbar)
         return m_scrollableArea->scrollPosition().x() - m_scrollableArea->minimumScrollPosition().x();
 
     return m_scrollableArea->scrollPosition().y() - m_scrollableArea->minimumScrollPosition().y();
 }
 
 } // namespace WebCore