Remove Scrollbar dependency on AXObjectCache

Source/core/platform/ScrollView.cpp

Index: Source/core/platform/ScrollView.cpp
diff --git a/Source/core/platform/ScrollView.cpp b/Source/core/platform/ScrollView.cpp
index 7174c9ba452a74c96235dc2dacf201fceaac74b2..f809a8e7005a5ee482e535398171e1ad384c425d 100644
--- a/Source/core/platform/ScrollView.cpp
+++ b/Source/core/platform/ScrollView.cpp
@@ -26,7 +26,6 @@
 #include "config.h"
 #include "core/platform/ScrollView.h"
 
-#include "core/accessibility/AXObjectCache.h"
 #include "core/platform/ScrollbarTheme.h"
 #include "core/platform/graphics/GraphicsContextStateSaver.h"
 #include "core/platform/graphics/GraphicsLayer.h"
@@ -77,16 +76,13 @@ void ScrollView::setHasHorizontalScrollbar(bool hasBar)
     if (hasBar && !m_horizontalScrollbar) {
         m_horizontalScrollbar = createScrollbar(HorizontalScrollbar);
         addChild(m_horizontalScrollbar.get());
-        didAddHorizontalScrollbar(m_horizontalScrollbar.get());
+        didAddScrollbar(m_horizontalScrollbar.get(), HorizontalScrollbar);
         m_horizontalScrollbar->styleChanged();
     } else if (!hasBar && m_horizontalScrollbar) {
-        willRemoveHorizontalScrollbar(m_horizontalScrollbar.get());
+        willRemoveScrollbar(m_horizontalScrollbar.get(), HorizontalScrollbar);
         removeChild(m_horizontalScrollbar.get());
         m_horizontalScrollbar = 0;
     }
-
-    if (AXObjectCache* cache = axObjectCache())
-        cache->handleScrollbarUpdate(this);
 }
 
 void ScrollView::setHasVerticalScrollbar(bool hasBar)
@@ -94,16 +90,13 @@ void ScrollView::setHasVerticalScrollbar(bool hasBar)
     if (hasBar && !m_verticalScrollbar) {
         m_verticalScrollbar = createScrollbar(VerticalScrollbar);
         addChild(m_verticalScrollbar.get());
-        didAddVerticalScrollbar(m_verticalScrollbar.get());
+        didAddScrollbar(m_verticalScrollbar.get(), VerticalScrollbar);
         m_verticalScrollbar->styleChanged();
     } else if (!hasBar && m_verticalScrollbar) {
-        willRemoveVerticalScrollbar(m_verticalScrollbar.get());
+        willRemoveScrollbar(m_verticalScrollbar.get(), VerticalScrollbar);
         removeChild(m_verticalScrollbar.get());
         m_verticalScrollbar = 0;
     }
-
-    if (AXObjectCache* cache = axObjectCache())
-        cache->handleScrollbarUpdate(this);
 }
 
 PassRefPtr<Scrollbar> ScrollView::createScrollbar(ScrollbarOrientation orientation)