Revert of Remove SIMD.js from V8.

test/cctest/test-object.cc

Index: test/cctest/test-object.cc
diff --git a/test/cctest/test-object.cc b/test/cctest/test-object.cc
index 71681b87d145b4c912dc0c566baa0ac145e38072..cade4284ae7a48b402f9768d67ebe946c3fb29c7 100644
--- a/test/cctest/test-object.cc
+++ b/test/cctest/test-object.cc
@@ -58,6 +58,9 @@
   CheckObject(isolate, factory->undefined_value(), "undefined");
   CheckObject(isolate, factory->null_value(), "null");
 
+  int lanes[] = {0, 1, 2, 3};
+  CheckObject(isolate, factory->NewInt32x4(lanes), "SIMD.Int32x4(0, 1, 2, 3)");
+
   CheckObject(isolate, factory->error_to_string(), "[object Error]");
   CheckObject(isolate, factory->stack_trace_symbol(),
               "Symbol(stack_trace_symbol)");