Remove IDBNotFoundError ExceptionCode

Source/core/dom/ExceptionCode.h

 /*
  *  Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Lesser General Public
  *  License as published by the Free Software Foundation; either
  *  version 2 of the License, or (at your option) any later version.
  *
  *  This library is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 46 matching lines @@
         // Others introduced in HTML5:
         NetworkError,
         AbortError,
         URLMismatchError,
         QuotaExceededError,
         TimeoutError,
         InvalidNodeTypeError,
         DataCloneError,
 
         // These are IDB-specific.
-        IDBNotFoundError,
         UnknownError,
         ConstraintError,
         DataError,
         TransactionInactiveError,
         ReadOnlyError,
         VersionError,
 
         // File system
         // FIXME: Consolidate these once https://crbug.com/252233 is fixed.
         FSNotFoundError,
@@ skipping 21 matching lines @@
         SQLTimeoutError,
 
         // WebIDL exception types, handled by the binding layer.
         // FIXME: Add GeneralError, EvalError, etc. when implemented in the bindings.
         TypeError,
     };
 
 } // namespace WebCore
 
 #endif // ExceptionCode_h