Bugfix in hydrogen array literal code generation.

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index e3bca3bfafabc901e0cc5b70b24faf953354aa2a..9a2072ec9f054cfc311f0265c41fb07ead0f124b 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -6064,6 +6064,11 @@ void HOptimizedGraphBuilder::VisitArrayLiteral(ArrayLiteral* expr) {
                                  isolate()->factory()->empty_string(),
                                  Runtime::FunctionForId(function_id),
                                  3));
+
+    // De-opt if elements kind changed from boilerplate_elements_kind.
+    Handle<Map> map = Handle<Map>(original_boilerplate_object->map(),
+                                  isolate());
+    AddInstruction(HCheckMaps::New(literal, map, zone()));
   }
 
   // The array is expected in the bailout environment during computation