Removing empty function definitions and WebAXObject interfaces

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 @@
     BLINK_EXPORT bool equals(const WebAXObject&) const;
 
     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;
 
     // Static methods for enabling accessibility.
     BLINK_EXPORT static void enableAccessibility();
     BLINK_EXPORT static bool accessibilityEnabled();
 
-    BLINK_EXPORT void startCachingComputedObjectAttributesUntilTreeMutates();
-    BLINK_EXPORT void stopCachingComputedObjectAttributes();
-
     // Temporary: this flag will only be toggleable until Chromium has it on by default.
     BLINK_EXPORT static void enableInlineTextBoxAccessibility();
 
     BLINK_EXPORT int axID() const;
 
     // Update 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.
@@ skipping 130 matching lines @@
     operator WTF::PassRefPtr<WebCore::AXObject>() const;
 #endif
 
 private:
     WebPrivatePtr<WebCore::AXObject> m_private;
 };
 
 } // namespace blink
 
 #endif