Refactor: Clear m_axObjectCache when AXObject detaches

Source/modules/accessibility/AXInlineTextBox.h

Index: Source/modules/accessibility/AXInlineTextBox.h
diff --git a/Source/modules/accessibility/AXInlineTextBox.h b/Source/modules/accessibility/AXInlineTextBox.h
index 5d814da151e21d189b6058eb258586866fdf60c0..cdbcd7e9edd39ebeaab60910428cd23bd1a39337 100644
--- a/Source/modules/accessibility/AXInlineTextBox.h
+++ b/Source/modules/accessibility/AXInlineTextBox.h
@@ -39,10 +39,10 @@ class AXObjectCacheImpl;
 class AXInlineTextBox final : public AXObject {
 
 private:
-    AXInlineTextBox(PassRefPtr<AbstractInlineTextBox>, AXObjectCacheImpl*);
+    AXInlineTextBox(PassRefPtr<AbstractInlineTextBox>, AXObjectCacheImpl&);
 
 public:
-    static PassRefPtr<AXInlineTextBox> create(PassRefPtr<AbstractInlineTextBox>, AXObjectCacheImpl*);
+    static PassRefPtr<AXInlineTextBox> create(PassRefPtr<AbstractInlineTextBox>, AXObjectCacheImpl&);
     virtual ~AXInlineTextBox();
 
     virtual void init() override;