Move builtin JavaScript sources into own directory.

src/harmony-sharedarraybuffer.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.
-
-(function(global, utils) {
-
-"use strict";
-
-%CheckIsBootstrapping();
-
-var GlobalSharedArrayBuffer = global.SharedArrayBuffer;
-var GlobalObject = global.Object;
-var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol");
-
-// -------------------------------------------------------------------
-
-function SharedArrayBufferConstructor(length) { // length = 1
-  if (%_IsConstructCall()) {
-    var byteLength = $toPositiveInteger(length, kInvalidArrayBufferLength);
-    %ArrayBufferInitialize(this, byteLength, kShared);
-  } else {
-    throw MakeTypeError(kConstructorNotFunction, "SharedArrayBuffer");
-  }
-}
-
-function SharedArrayBufferGetByteLen() {
-  if (!IS_SHAREDARRAYBUFFER(this)) {
-    throw MakeTypeError(kIncompatibleMethodReceiver,
-                        'SharedArrayBuffer.prototype.byteLength', this);
-  }
-  return %_ArrayBufferGetByteLength(this);
-}
-
-function SharedArrayBufferIsViewJS(obj) {
-  return %ArrayBufferIsView(obj);
-}
-
-
-// Set up the SharedArrayBuffer constructor function.
-%SetCode(GlobalSharedArrayBuffer, SharedArrayBufferConstructor);
-%FunctionSetPrototype(GlobalSharedArrayBuffer, new GlobalObject());
-
-// Set up the constructor property on the SharedArrayBuffer prototype object.
-%AddNamedProperty(GlobalSharedArrayBuffer.prototype, "constructor",
-                  GlobalSharedArrayBuffer, DONT_ENUM);
-
-%AddNamedProperty(GlobalSharedArrayBuffer.prototype,
-    toStringTagSymbol, "SharedArrayBuffer", DONT_ENUM | READ_ONLY);
-
-utils.InstallGetter(GlobalSharedArrayBuffer.prototype, "byteLength",
-                    SharedArrayBufferGetByteLen);
-
-utils.InstallFunctions(GlobalSharedArrayBuffer, DONT_ENUM, [
-    "isView", SharedArrayBufferIsViewJS
-]);
-
-})