Improve handling of dictionary conversions.

Source/bindings/v8/ExceptionMessages.h

Index: Source/bindings/v8/ExceptionMessages.h
diff --git a/Source/bindings/v8/ExceptionMessages.h b/Source/bindings/v8/ExceptionMessages.h
index dd41c631297fd0600fdcb60c4cd6ac3bc37a88d2..5b1b30d383542cc0bb9febbbf8b71cd0338e1f50 100644
--- a/Source/bindings/v8/ExceptionMessages.h
+++ b/Source/bindings/v8/ExceptionMessages.h
@@ -42,6 +42,7 @@ public:
     static String failedToGet(const String& property, const String& type, const String& detail);
     static String failedToSet(const String& property, const String& type, const String& detail);
     static String failedToDelete(const String& property, const String& type, const String& detail);
+    static String illTypedProperty(const String& property, const String& detail);

[Mike West, 2013/11/25 08:22:48]

How about "incorrectPropertyType" instead? "Ill-typed" is nicely poetic, but I
worry that it might not be as comprehensible. :)

[sof, 2013/11/25 23:24:05]

Done. Interesting, this is standard terminology in Haskell (my background and
language of preference) for something that doesn't "type."

 
     // 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.