[crankshaft] FIx for in deopt at the end of the loop.

test/mjsunit/regress/regress-662904.js

Index: test/mjsunit/regress/regress-662904.js
diff --git a/test/mjsunit/regress/regress-3650-3.js b/test/mjsunit/regress/regress-662904.js
similarity index 60%
copy from test/mjsunit/regress/regress-3650-3.js
copy to test/mjsunit/regress/regress-662904.js
index 013e4df2834e20435982300303eb6260eb41b2be..00ab1cd65fad58a3d9cc283bad20ced18c317fca 100644
--- a/test/mjsunit/regress/regress-3650-3.js
+++ b/test/mjsunit/regress/regress-662904.js
@@ -5,13 +5,15 @@
 // Flags: --allow-natives-syntax
 
 function foo(a) {
-  for (var d in a) {
-    delete a[1];
+  var sum = 0;
+  var a = [0, "a"];
+  for (var i in a) {
+    sum += a[i];
   }
+  return sum;
 }
 
-foo([1,2,3]);
-foo([2,3,4]);
+assertEquals("0a", foo());
+assertEquals("0a", foo());
 %OptimizeFunctionOnNextCall(foo);
-foo([1,2,3]);
-assertOptimized(foo);
+assertEquals("0a", foo());