Update typed arrays behavior to match ES6 rev 15. Remove TO_POSITIVE_INTEGER and throw on negative …

src/arraybuffer.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 13 matching lines @@
 // 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";
 
 var $ArrayBuffer = global.ArrayBuffer;
 
 // -------------------------------------------------------------------
 
-function ArrayBufferConstructor(byteLength) { // length = 1
+function ArrayBufferConstructor(length) { // length = 1
   if (%_IsConstructCall()) {
-    var l = TO_POSITIVE_INTEGER(byteLength);
-    %ArrayBufferInitialize(this, l);
+    var byteLength = IS_UNDEFINED(length) ? 0 : TO_INTEGER(length);

[rossberg, 2013/06/24 12:36:03]

Doesn't TO_INTEGER(undefined) yield 0 anyway?

+    if (byteLength < 0)
+      throw MakeRangeError("invalid_array_buffer_length");
+    %ArrayBufferInitialize(this, byteLength);
   } else {
-    return new $ArrayBuffer(byteLength);
+    return new $ArrayBuffer(length);
   }
 }
 
 function ArrayBufferGetByteLength() {
   if (!IS_ARRAYBUFFER(this)) {
     throw MakeTypeError('incompatible_method_receiver',
                         ['ArrayBuffer.prototype.byteLength', this]);
   }
   return %ArrayBufferGetByteLength(this);
 }
@@ skipping 41 matching lines @@
   InstallGetter($ArrayBuffer.prototype, "byteLength", ArrayBufferGetByteLength);
 
   InstallFunctions($ArrayBuffer.prototype, DONT_ENUM, $Array(
       "slice", ArrayBufferSlice
   ));
 }
 
 SetUpArrayBuffer();