Internalize strings being stored into uninitialized property cells

test/mjsunit/regress/regress-crbug-320922.js

Index: test/mjsunit/regress/regress-crbug-320922.js
diff --git a/test/mjsunit/regress/regress-crbug-320922.js b/test/mjsunit/regress/regress-crbug-320922.js
index 9ba759a43ed819eec6d1701e9b7610882e01bfd1..f19962843a31067cc34c7ede51b639d24ba55338 100644
--- a/test/mjsunit/regress/regress-crbug-320922.js
+++ b/test/mjsunit/regress/regress-crbug-320922.js
@@ -27,8 +27,10 @@
 
 // Flags: --allow-natives-syntax
 
-var string = "hello world";
-var expected = "Hello " + "world";
+var string = "internalized dummy";
+var expected = "internalized dummy";
+string = "hello world";
+expected = "Hello " + "world";
 function Capitalize() {
   %_OneByteSeqStringSetChar(0, 0x48, string);
 }