Move AXObjectCache::remove so it is after ContainerNode::detach

Source/modules/accessibility/AXScrollView.cpp

Index: Source/modules/accessibility/AXScrollView.cpp
diff --git a/Source/modules/accessibility/AXScrollView.cpp b/Source/modules/accessibility/AXScrollView.cpp
index abfa02a50399c34cf502ffe65b88ed6a8bcd3e2e..6ded3d29fcfbe8acc5b973aba8da269a7ff394f2 100644
--- a/Source/modules/accessibility/AXScrollView.cpp
+++ b/Source/modules/accessibility/AXScrollView.cpp
@@ -171,6 +171,7 @@ bool AXScrollView::computeAccessibilityIsIgnored(IgnoredReasons* ignoredReasons)
 
 void AXScrollView::addChildren()
 {
+    ASSERT(!isDetached());
     ASSERT(!m_haveChildren);
     m_haveChildren = true;
 
@@ -225,6 +226,7 @@ FrameView* AXScrollView::documentFrameView() const
 
 AXObject* AXScrollView::computeParent() const
 {
+    ASSERT(!isDetached());
     if (!m_scrollView || !m_scrollView->isFrameView())
         return 0;