Improve generated "Not enough arguments." TypeError exceptions.

Source/bindings/v8/V8ThrowException.h

Index: Source/bindings/v8/V8ThrowException.h
diff --git a/Source/bindings/v8/V8ThrowException.h b/Source/bindings/v8/V8ThrowException.h
index d3d8401b73065d1e2804acbde3adb5cd4bc577ca..ac996e8369481abf78c4472e0dfcb33b1f5348d4 100644
--- a/Source/bindings/v8/V8ThrowException.h
+++ b/Source/bindings/v8/V8ThrowException.h
@@ -68,6 +68,7 @@ public:
     static v8::Handle<v8::Value> createTypeError(const String&, v8::Isolate*);
     static v8::Handle<v8::Value> throwTypeError(const String&, v8::Isolate*);
 
+    // FIXME: Kill this once we kill all the callsites, since we want to pass in useful information as a string.
     static v8::Handle<v8::Value> throwNotEnoughArgumentsError(v8::Isolate*);
 };