Fix parallel recompilation wrt initial object/array map dependency.

test/mjsunit/parallel-initial-prototype-change.js

Index: test/mjsunit/parallel-initial-prototype-change.js
diff --git a/test/mjsunit/elide-double-hole-check-6.js b/test/mjsunit/parallel-initial-prototype-change.js
similarity index 77%
copy from test/mjsunit/elide-double-hole-check-6.js
copy to test/mjsunit/parallel-initial-prototype-change.js
index 01a8096f85c2381d400d436198daa59fe7ca9ce0..5544bebc1d49256f50b00a42d71a06f740ed7aaa 100644
--- a/test/mjsunit/elide-double-hole-check-6.js
+++ b/test/mjsunit/parallel-initial-prototype-change.js
@@ -26,14 +26,25 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Flags: --allow-natives-syntax
+// Flags: --parallel-recompilation --parallel-recompilation-delay=50
+
+function assertUnoptimized(fun) {
+  assertTrue(%GetOptimizationStatus(fun) != 1);
+}
 
 function f1(a, i) {
   return a[i] + 0.5;
 }
+
 var arr = [0.0,,2.5];
 assertEquals(0.5, f1(arr, 0));
 assertEquals(0.5, f1(arr, 0));
-%OptimizeFunctionOnNextCall(f1);
+
+// Optimized code of f1 depends on initial object and array maps.
+%OptimizeFunctionOnNextCall(f1, "parallel");
 assertEquals(0.5, f1(arr, 0));
-Array.prototype.__proto__[1] = 1.5;
+assertUnoptimized(f1);      // Not yet optimized.
+Object.prototype[1] = 1.5;  // Invalidate current initial object map.
 assertEquals(2, f1(arr, 1));
+%CompleteOptimization(f1);  // Conclude optimization with...
+assertUnoptimized(f1);      // ... bailing out due to map dependency.