[es8] More spec compliant syntactic tail calls implementation.

test/message/syntactic-tail-call-in-subclass.js

Index: test/message/syntactic-tail-call-in-subclass.js
diff --git a/test/message/syntactic-tail-call-in-try.js b/test/message/syntactic-tail-call-in-subclass.js
similarity index 71%
copy from test/message/syntactic-tail-call-in-try.js
copy to test/message/syntactic-tail-call-in-subclass.js
index 97eb4f757ab27e898e888078a46b80a8df61097a..aedfebd5b31dcbfc1410479e772ee212adb3ade8 100644
--- a/test/message/syntactic-tail-call-in-try.js
+++ b/test/message/syntactic-tail-call-in-subclass.js
@@ -4,13 +4,11 @@
 
 // Flags: --harmony-explicit-tailcalls
 
-function f() {
-  return 1;
-}
-
 function g() {
-  try {
-    return continue f();
-  } catch(e) {
+  class A {};
+  class B extends A {
+    constructor() {
+      return continue f() ;
+    }
   }
 }