Don't insert elements transitions into normalized maps

test/mjsunit/regress/regress-499790.js

Index: test/mjsunit/regress/regress-499790.js
diff --git a/test/mjsunit/regress/regress-crbug-493779.js b/test/mjsunit/regress/regress-499790.js
similarity index 67%
copy from test/mjsunit/regress/regress-crbug-493779.js
copy to test/mjsunit/regress/regress-499790.js
index 1071ed23ac95a50cc3312cf1d29f75fafd0599a8..ce2cd03f02584387e4a99be230a6d8402893836e 100644
--- a/test/mjsunit/regress/regress-crbug-493779.js
+++ b/test/mjsunit/regress/regress-499790.js
@@ -4,8 +4,11 @@
 
 // Flags: --enable-slow-asserts
 
-var s = "\u1234-------";
-for (var i = 0; i < 17; i++) {
-  s += s;
-}
-s.replace(/[\u1234]/g, "");
+var a = [1];
+a.foo = "bla";
+delete a.foo;
+a[0] = 1.5;
+
+var a2 = [];
+a2.foo = "bla";
+delete a2.foo;