Rename %_IsSpecObject to %_IsJSReceiver.

src/parsing/parser.h

Index: src/parsing/parser.h
diff --git a/src/parsing/parser.h b/src/parsing/parser.h
index b27f5512717f91db6c9fe36fb78e5d52cd2999ac..1ff58572f3f266f9f0b1c17901ca680da33c9152 100644
--- a/src/parsing/parser.h
+++ b/src/parsing/parser.h
@@ -1102,7 +1102,7 @@ class Parser : public ParserBase<ParserTraits> {
   TryStatement* ParseTryStatement(bool* ok);
   DebuggerStatement* ParseDebuggerStatement(bool* ok);
 
-  // !%_IsSpecObject(result = iterator.next()) &&
+  // !%_IsJSReceiver(result = iterator.next()) &&
   //     %ThrowIteratorResultNotAnObject(result)
   Expression* BuildIteratorNextResult(Expression* iterator, Variable* result,
                                       int pos);