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

Source/modules/accessibility/AXSVGRoot.cpp

Index: Source/modules/accessibility/AXSVGRoot.cpp
diff --git a/Source/modules/accessibility/AXSVGRoot.cpp b/Source/modules/accessibility/AXSVGRoot.cpp
index 3ff6f9698b4ede2c70d7cd158bde2354537e1924..3b5fe2f9fb9d6d13620f9bdf4130d36464ad4956 100644
--- a/Source/modules/accessibility/AXSVGRoot.cpp
+++ b/Source/modules/accessibility/AXSVGRoot.cpp
@@ -59,6 +59,7 @@ void AXSVGRoot::setParent(AXObject* parent)
 
 AXObject* AXSVGRoot::computeParent() const
 {
+    ASSERT(!isDetached());
     // If a parent was set because this is a remote SVG resource, use that
     // but otherwise, we should rely on the standard layout tree for the parent.
     if (m_parent)