Revert of Remove SIMD.js from V8.

src/factory.h

 // Copyright 2014 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.
 
 #ifndef V8_FACTORY_H_
 #define V8_FACTORY_H_
 
 #include "src/feedback-vector.h"
 #include "src/globals.h"
 #include "src/isolate.h"
@@ skipping 451 matching lines @@
   // Creates mutable heap number object with value field set to hole NaN.
   Handle<HeapNumber> NewMutableHeapNumber(
       PretenureFlag pretenure = NOT_TENURED) {
     return NewHeapNumberFromBits(kHoleNanInt64, MUTABLE, pretenure);
   }
 
   // Creates heap number object with not yet set value field.
   Handle<HeapNumber> NewHeapNumber(MutableMode mode,
                                    PretenureFlag pretenure = NOT_TENURED);
 
+#define SIMD128_NEW_DECL(TYPE, Type, type, lane_count, lane_type) \
+  Handle<Type> New##Type(lane_type lanes[lane_count],             \
+                         PretenureFlag pretenure = NOT_TENURED);
+  SIMD128_TYPES(SIMD128_NEW_DECL)
+#undef SIMD128_NEW_DECL
+
   Handle<JSWeakMap> NewJSWeakMap();
 
   Handle<JSObject> NewArgumentsObject(Handle<JSFunction> callee, int length);
 
   // JS objects are pretenured when allocated by the bootstrapper and
   // runtime.
   Handle<JSObject> NewJSObject(Handle<JSFunction> constructor,
                                PretenureFlag pretenure = NOT_TENURED);
   // JSObject without a prototype.
   Handle<JSObject> NewJSObjectWithNullProto(
@@ skipping 357 matching lines @@
   void SetStrictFunctionInstanceDescriptor(Handle<Map> map,
                                            FunctionMode function_mode);
 
   void SetClassFunctionInstanceDescriptor(Handle<Map> map);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_FACTORY_H_