IDL: Generate union type containers

Source/bindings/core/v8/V8BindingMacros.h

 /*
  * Copyright (C) 2010 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 117 matching lines @@
 #define TOSTRING_VOID(type, var, value) \
     type var(value);                    \
     if (UNLIKELY(!var.prepare()))       \
         return;
 
 #define TOSTRING_VOID_INTERNAL(var, value) \
     var = (value);                         \
     if (UNLIKELY(!var.prepare()))          \
         return;
 
+#define TOSTRING_VOID_EXCEPTIONSTATE(type, var, value, exceptionState) \
+    type var(value);                                                   \
+    if (UNLIKELY(!var.prepare(exceptionState)))                        \
+        return;
+
 #define TOSTRING_DEFAULT(type, var, value, retVal) \
     type var(value);                               \
     if (UNLIKELY(!var.prepare()))                  \
         return retVal;
 
 // We need to cancel the exception propagation when we return a rejected
 // Promise.
 #define TOSTRING_VOID_EXCEPTIONSTATE_PROMISE_INTERNAL(var, value, exceptionState, info, scriptState) \
     var = (value);                                                                                   \
     if (UNLIKELY(!var.prepare(exceptionState)))  {                                                   \
         v8SetReturnValue(info, exceptionState.reject(scriptState).v8Value());                        \
         return;                                                                                      \
     }
 
 } // namespace blink
 
 #endif // V8BindingMacros_h