Merge 87856

Source/WebCore/accessibility/AccessibilityObject.cpp

 /*
  * Copyright (C) 2008, 2009, 2011 Apple 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 699 matching lines @@
     return plainTextRangeForVisiblePositionRange(range);
 }
 
 // Given an indexed character, the line number of the text associated with this accessibility
 // object that contains the character.
 unsigned AccessibilityObject::doAXLineForIndex(unsigned index)
 {
     return lineForPosition(visiblePositionForIndex(index, false));
 }
     
+void AccessibilityObject::updateBackingStore()
+{
+    // Updating the layout may delete this object.
+    if (Document* document = this->document())
+        document->updateLayoutIgnorePendingStylesheets();
+}
+
 Document* AccessibilityObject::document() const
 {
     FrameView* frameView = documentFrameView();
     if (!frameView)
         return 0;
     
     return frameView->frame()->document();
 }
 
 FrameView* AccessibilityObject::documentFrameView() const 
@@ skipping 364 matching lines @@
     const AtomicString& result = getAttribute(aria_checkedAttr);
     if (equalIgnoringCase(result, "true"))
         return ButtonStateOn;
     if (equalIgnoringCase(result, "mixed"))
         return ButtonStateMixed;
     
     return ButtonStateOff;
 }
     
 } // namespace WebCore