Improve handling of dictionary conversions.

Source/bindings/v8/ExceptionMessages.cpp

 /*
  * 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 42 matching lines @@
 String ExceptionMessages::failedToSet(const String& property, const String& type, const String& detail)
 {
     return "Failed to set the '" + property + "' property on '" + type + "': " + detail;
 }
 
 String ExceptionMessages::failedToDelete(const String& property, const String& type, const String& detail)
 {
     return "Failed to delete the '" + property + "' property from '" + type + "': " + detail;
 }
 
+String ExceptionMessages::incorrectPropertyType(const String& property, const String& detail)
+{
+    return "The '" + property + "' property " + detail;
+}
+
 String ExceptionMessages::notAnArrayTypeArgumentOrValue(int argumentIndex)
 {
     String kind;
     if (argumentIndex) // method argument
         kind = ordinalNumber(argumentIndex) + " argument";
     else // value, e.g. attribute setter
         kind = "value provided";
     return "The " + kind + " is neither an array, nor does it have indexed properties.";
 }
 
@@ skipping 27 matching lines @@
         break;
     case 3:
         if (number % 100 != 13)
             suffix = "rd";
         break;
     }
     return String::number(number) + suffix;
 }
 
 } // namespace WebCore