Revert of Remove SIMD.js from V8.

test/mjsunit/messages.js

 // Copyright 2015 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.
 
 // Flags: --stack-size=100 --harmony
+// Flags: --harmony-simd
 
 function test(f, expected, type) {
   try {
     f();
   } catch (e) {
     assertInstanceof(e, type);
     assertEquals(expected, e.message);
     return;
   }
   assertUnreachable("Exception expected");
@@ skipping 296 matching lines @@
 // kSymbolToString
 test(function() {
   "" + Symbol();
 }, "Cannot convert a Symbol value to a string", TypeError);
 
 // kSymbolToNumber
 test(function() {
   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);
 }, "Cannot convert undefined or null to object", TypeError);
 
 // kValueAndAccessor
 test(function() {
   Object.defineProperty({}, "x", { get: function(){}, value: 1});
 }, "Invalid property descriptor. Cannot both specify accessors " +
    "and a value or writable attribute, #<Object>", TypeError);
@@ skipping 112 matching lines @@
   Number(1).toString(100);
 }, "toString() radix argument must be between 2 and 36", RangeError);
 
 
 // === URIError ===
 
 // kURIMalformed
 test(function() {
   decodeURI("%%");
 }, "URI malformed", URIError);