IDL: Merge stringifier/serializer definition from implemented interface

third_party/WebKit/Source/bindings/tests/idls/core/TestInterface.idl

 /*
  * 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:
  *
  *     * 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 64 matching lines @@
     // Anonymous indexed property operations
     [DoNotCheckSecurity] getter DOMString (unsigned long index);
     setter DOMString (unsigned long index, DOMString value);
     deleter boolean (unsigned long index);
 
     // Anonymous named property operations
     [DoNotCheckSecurity] getter DOMString (DOMString name);
     setter DOMString (DOMString name, DOMString value);
     deleter boolean (DOMString name);
 
-    [NotEnumerable] stringifier;
-    [NotEnumerable, RaisesException] serializer;
-
     // Per-method [Exposed] annotation support.
     void alwaysExposedMethod();
     [Exposed=Worker] void workerExposedMethod();
     [Exposed=Window] void windowExposedMethod();
 
     static void alwaysExposedStaticMethod();
     [Exposed=Worker] static void workerExposedStaticMethod();
     [Exposed=Window] static void windowExposedStaticMethod();
     static TestInterface staticReturnDOMWrapperMethod();
 
@@ skipping 19 matching lines @@
     static Promise staticPromiseMethodPartialOverload();
 
     [LenientThis] attribute any lenientThisAttribute;
 
     [LegacyInterfaceTypeChecking] void legacyInterfaceTypeCheckingMethod(TestInterfaceEmpty testInterfaceEmptyArg);
 };
 
 TestInterface implements TestImplements;
 // TestInterface implements TestImplements2; // at implement*ed* interface
 TestInterface implements TestImplements3;