Refactor: Clear m_axObjectCache when AXObject detaches

Source/modules/accessibility/AXInlineTextBox.h

 /*
  * Copyright (C) 2013, Google 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
@@ skipping 21 matching lines @@
 #include "core/layout/line/AbstractInlineTextBox.h"
 #include "modules/accessibility/AXObject.h"
 
 namespace blink {
 
 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;
     virtual void detach() override;
 
     void setInlineTextBox(AbstractInlineTextBox* inlineTextBox) { m_inlineTextBox = inlineTextBox; }
 
     virtual AccessibilityRole roleValue() const override { return InlineTextBoxRole; }
     virtual String stringValue() const override;
     virtual void textCharacterOffsets(Vector<int>&) const override;
     virtual void wordBoundaries(Vector<PlainTextRange>& words) const override;
     virtual LayoutRect elementRect() const override;
     virtual AXObject* computeParent() const override;
     virtual AccessibilityTextDirection textDirection() const override;
     virtual AXObject* nextOnLine() const override;
     virtual AXObject* previousOnLine() const override;
 
 private:
     RefPtr<AbstractInlineTextBox> m_inlineTextBox;
 
     virtual bool computeAccessibilityIsIgnored(IgnoredReasons* = nullptr) const override;
 };
 
 } // namespace blink
 
 #endif // AXInlineTextBox_h