Remove deprecated updateBackingStoreAndCheckValidity from WebAXObject

public/web/WebAXObject.h

 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 58 matching lines @@
 
     bool isNull() const { return m_private.isNull(); }
     // isDetached also checks for null, so it's safe to just call isDetached.
     BLINK_EXPORT bool isDetached() const;
 
     BLINK_EXPORT int axID() const;
 
     // Update layout on the underlying tree, and return true if this object is
     // still valid (not detached). Note that calling this method
     // can cause other WebAXObjects to become invalid, too,
-    // so always call isDetached if updateBackingStoreAndCheckValidity
-    // has been called on any object, or if any other WebCore code has run.
+    // so always call isDetached if any other WebCore code has run.
     BLINK_EXPORT bool updateLayoutAndCheckValidity();
 
-    // FIXME: Deprecated - remove once callers use updateLayoutAndCheckValidity, instead.
-    BLINK_EXPORT bool updateBackingStoreAndCheckValidity();
-
     BLINK_EXPORT WebString accessibilityDescription() const;
     BLINK_EXPORT unsigned childCount() const;
 
     BLINK_EXPORT WebAXObject childAt(unsigned) const;
     BLINK_EXPORT WebAXObject parentObject() const;
 
     BLINK_EXPORT bool isAnchor() const;
     BLINK_EXPORT bool isAriaReadOnly() const;
     BLINK_EXPORT bool isButtonStateMixed() const;
     BLINK_EXPORT bool isChecked() const;
@@ skipping 128 matching lines @@
     operator WTF::PassRefPtr<AXObject>() const;
 #endif
 
 private:
     WebPrivatePtr<AXObject> m_private;
 };
 
 } // namespace blink
 
 #endif