Do not look up ArrayBuffer on global object in typed array constructor.

src/typedarray.js

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 12 matching lines @@
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 "use strict";
 
 // This file relies on the fact that the following declaration has been made
 // in runtime.js:
 // var $Array = global.Array;
-
+var $ArrayBuffer = global.ArrayBuffer;
 
 
 // --------------- Typed Arrays ---------------------
 
 function CreateTypedArrayConstructor(name, elementSize, arrayId, constructor) {
   function ConstructByArrayBuffer(obj, buffer, byteOffset, length) {
     var offset = ToPositiveInteger(byteOffset, "invalid_typed_array_length")
 
     if (offset % elementSize !== 0) {
       throw MakeRangeError("invalid_typed_array_alignment",
@@ skipping 19 matching lines @@
     }
     if (offset + newByteLength > bufferByteLength) {
       throw MakeRangeError("invalid_typed_array_length");
     }
     %TypedArrayInitialize(obj, arrayId, buffer, offset, newByteLength);
   }
 
   function ConstructByLength(obj, length) {
     var l = ToPositiveInteger(length, "invalid_typed_array_length");
     var byteLength = l * elementSize;
-    var buffer = new global.ArrayBuffer(byteLength);
+    var buffer = new $ArrayBuffer(byteLength);
     %TypedArrayInitialize(obj, arrayId, buffer, 0, byteLength);
   }
 
   function ConstructByArrayLike(obj, arrayLike) {
     var length = arrayLike.length;
     var l = ToPositiveInteger(length, "invalid_typed_array_length");
     if(!%TypedArrayInitializeFromArrayLike(obj, arrayId, arrayLike, l)) {
       for (var i = 0; i < l; i++) {
         // It is crucial that we let any execptions from arrayLike[i]
         // propagate outside the function.
@@ skipping 504 matching lines @@
 
       "getFloat32", DataViewGetFloat32,
       "setFloat32", DataViewSetFloat32,
 
       "getFloat64", DataViewGetFloat64,
       "setFloat64", DataViewSetFloat64
   ));
 }
 
 SetupDataView();