harmony-classes: Implement 'super(...)' call syntactic restriction.

src/messages.js

Index: src/messages.js
diff --git a/src/messages.js b/src/messages.js
index 142e47bcc0be8b7de3e52fb998fea5597da18cb0..0e98774edc4bdb3c698ba36757de757cae019371 100644
--- a/src/messages.js
+++ b/src/messages.js
@@ -182,6 +182,7 @@ var kMessages = {
   prototype_parent_not_an_object: ["Class extends value does not have valid prototype property ", "%0"],
   duplicate_constructor:         ["A class may only have one constructor"],
   sloppy_lexical:                ["Block-scoped declarations (let, const, function, class) not yet supported outside strict mode"],
+  super_constructor_call:        ["'super(...)' constructor call is currently only supported if it is the first statement of a constructor and its arguments do not access 'this'"],

[rossberg, 2014/11/27 19:04:40]

Suggestion:

"A 'super' constructor call may only appear as the first statement of a
function, and its arguments may not access 'this'. Other forms are not yet
supported."

[Dmitry Lomov (no reviews), 2014/11/27 19:41:57]

Done.

 };