Refactor: Clear m_axObjectCache when AXObject detaches

Source/modules/accessibility/AXInlineTextBox.cpp

 /*
  * 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/dom/Range.h"
 #include "core/layout/LayoutText.h"
 #include "modules/accessibility/AXObjectCacheImpl.h"
 #include "platform/LayoutUnit.h"
 
 
 namespace blink {
 
 using namespace HTMLNames;
 
-AXInlineTextBox::AXInlineTextBox(PassRefPtr<AbstractInlineTextBox> inlineTextBox, AXObjectCacheImpl* axObjectCache)
+AXInlineTextBox::AXInlineTextBox(PassRefPtr<AbstractInlineTextBox> inlineTextBox, AXObjectCacheImpl& axObjectCache)
     : AXObject(axObjectCache)
     , m_inlineTextBox(inlineTextBox)
 {
 }
 
 AXInlineTextBox::~AXInlineTextBox()
 {
     if (m_axObjectCache && m_inlineTextBox)
         m_axObjectCache->remove(m_inlineTextBox.get());
 }
 
-PassRefPtr<AXInlineTextBox> AXInlineTextBox::create(PassRefPtr<AbstractInlineTextBox> inlineTextBox, AXObjectCacheImpl* axObjectCache)
+PassRefPtr<AXInlineTextBox> AXInlineTextBox::create(PassRefPtr<AbstractInlineTextBox> inlineTextBox, AXObjectCacheImpl& axObjectCache)
 {
     return adoptRef(new AXInlineTextBox(inlineTextBox, axObjectCache));
 }
 
 void AXInlineTextBox::init()
 {
 }
 
 void AXInlineTextBox::detach()
 {
@@ skipping 111 matching lines @@
     if (previousOnLine)
         return m_axObjectCache->getOrCreate(previousOnLine.get());
 
     if (!m_inlineTextBox->isFirst())
         return 0;
 
     return parentObject()->previousOnLine();
 }
 
 } // namespace blink