Revert of Remove SIMD.js from V8.

test/mjsunit/messages.js

Index: test/mjsunit/messages.js
diff --git a/test/mjsunit/messages.js b/test/mjsunit/messages.js
index 31c64924853db11fe6d6f8535a4f8c021b457268..30abc197e9b941bc80a038633409af23a1996dcb 100644
--- a/test/mjsunit/messages.js
+++ b/test/mjsunit/messages.js
@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 // Flags: --stack-size=100 --harmony
+// Flags: --harmony-simd
 
 function test(f, expected, type) {
   try {
@@ -319,6 +320,11 @@
   1 + Symbol();
 }, "Cannot convert a Symbol value to a number", TypeError);
 
+// kSimdToNumber
+test(function() {
+  1 + SIMD.Float32x4(1, 2, 3, 4);
+}, "Cannot convert a SIMD value to a number", TypeError);
+
 // kUndefinedOrNullToObject
 test(function() {
   Array.prototype.toString.call(null);