Better arity checks for overloads

Source/bindings/v8/ExceptionMessages.h

 /*
  * 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 101 matching lines @@
         result.append(") is outside the range ");
         result.append(lowerType == ExclusiveBound ? '(' : '[');
         result.append(formatNumber(lowerBound));
         result.append(", ");
         result.append(formatNumber(upperBound));
         result.append(upperType == ExclusiveBound ? ')' : ']');
         result.append('.');
         return result.toString();
     }
 
+    static String invalidArity(const char* expected, unsigned provided);
+
     // If  > 0, the argument index that failed type check (1-indexed.)
     // If == 0, a (non-argument) value (e.g., a setter) failed the same check.
     static String notAnArrayTypeArgumentOrValue(int argumentIndex);
     static String notASequenceTypeProperty(const String& propertyName);
     static String notAFiniteNumber(double value, const char* name = "value provided");
     static String notAFiniteNumber(const Decimal& value, const char* name = "value provided");
 
     static String notEnoughArguments(unsigned expected, unsigned providedleastNumMandatoryParams);
 
     static String readOnly(const char* detail = 0);
@@ skipping 21 matching lines @@
 
     static String ordinalNumber(int number);
 };
 
 template <> String ExceptionMessages::formatNumber<float>(float number);
 template <> String ExceptionMessages::formatNumber<double>(double number);
 
 } // namespace WebCore
 
 #endif // ExceptionMessages_h