[turbofan] Remove overly restrictive DCHECK.

test/mjsunit/regress/regress-crbug-630923.js

Index: test/mjsunit/regress/regress-crbug-630923.js
diff --git a/test/mjsunit/regress/regress-crbug-629435.js b/test/mjsunit/regress/regress-crbug-630923.js
similarity index 76%
copy from test/mjsunit/regress/regress-crbug-629435.js
copy to test/mjsunit/regress/regress-crbug-630923.js
index b73f601c71fcf9fac7a321da8648d056dbe1edd4..ff0d2dd05efbedec15a515545eac2184c36c59f3 100644
--- a/test/mjsunit/regress/regress-crbug-629435.js
+++ b/test/mjsunit/regress/regress-crbug-630923.js
@@ -4,16 +4,13 @@
 
 // Flags: --allow-natives-syntax
 
-function bar(v) {
-  v.constructor;
+var o = {};
+function bar(o) {
+  return 1 + (o.t ? 1 : 2);
 }
-
-bar([]);
-bar([]);
-
 function foo() {
-  var x = -0;
-  bar(x + 1);
+  bar(o);
 }
+foo();
 %OptimizeFunctionOnNextCall(foo);
 foo();