Revert of Remove SIMD.js from V8.

test/cctest/test-object.cc

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/factory.h"
 #include "src/handles-inl.h"
 #include "src/handles.h"
 #include "src/isolate.h"
 #include "src/objects-inl.h"
 #include "src/objects.h"
@@ skipping 40 matching lines @@
 
   CheckString(isolate, "fisk hest", "fisk hest");
   CheckNumber(isolate, 42.3, "42.3");
   CheckSmi(isolate, 42, "42");
   CheckBoolean(isolate, true, "true");
   CheckBoolean(isolate, false, "false");
   CheckBoolean(isolate, false, "false");
   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)");
   CheckObject(isolate, factory->NewError(isolate->error_function(),
                                          factory->empty_string()),
               "Error");
   CheckObject(isolate, factory->NewError(
                            isolate->error_function(),
                            factory->NewStringFromAsciiChecked("fisk hest")),
               "Error: fisk hest");
   CheckObject(isolate, factory->NewJSObject(isolate->object_function()),
               "#<Object>");
 }