[es6] Perform the IsConstructor test in GetSuperConstructor.

src/messages.h

Index: src/messages.h
diff --git a/src/messages.h b/src/messages.h
index 153c01964bdac4b7a596cefa0379029ced4faf95..e9a6912fc910875e8471c8c791b0b1b969483587 100644
--- a/src/messages.h
+++ b/src/messages.h
@@ -342,7 +342,7 @@ class ErrorUtils : public AllStatic {
   T(NotIterable, "% is not iterable")                                          \
   T(NotPropertyName, "% is not a valid property name")                         \
   T(NotTypedArray, "this is not a typed array.")                               \
-  T(NotSharedTypedArray, "% is not a shared typed array.")                     \
+  T(NotSuperConstructor, "Super constructor % of % is not a constructor.")     \

[Henrique Ferreiro, 2016/12/16 10:47:57]

I am seeing mixed use of the trailing dot. Which one is correct?

[Benedikt Meurer, 2016/12/16 10:48:38]

Pick one, you decide :-)

   T(NotIntegerSharedTypedArray, "% is not an integer shared typed array.")     \
   T(NotInt32SharedTypedArray, "% is not an int32 shared typed array.")         \
   T(ObjectGetterExpectingFunction,                                             \