[runtime] %TransitionElementsKind works for any kind of JSObject.

test/mjsunit/regress/regress-crbug-629823.js

Index: test/mjsunit/regress/regress-crbug-629823.js
diff --git a/test/mjsunit/regress/regress-crbug-629435.js b/test/mjsunit/regress/regress-crbug-629823.js
similarity index 68%
copy from test/mjsunit/regress/regress-crbug-629435.js
copy to test/mjsunit/regress/regress-crbug-629823.js
index b73f601c71fcf9fac7a321da8648d056dbe1edd4..bbf74b80afd2fa52b020a03b19553c6d257d43ff 100644
--- a/test/mjsunit/regress/regress-crbug-629435.js
+++ b/test/mjsunit/regress/regress-crbug-629823.js
@@ -4,16 +4,14 @@
 
 // Flags: --allow-natives-syntax
 
-function bar(v) {
-  v.constructor;
-}
-
-bar([]);
-bar([]);
-
-function foo() {
-  var x = -0;
-  bar(x + 1);
+var o = {}
+function bar() {
+  o[0] = +o[0];
+  o = /\u23a1|__v_4/;
 }
+bar();
+bar();
+bar();
+function foo() { bar(); }
 %OptimizeFunctionOnNextCall(foo);
 foo();