Use intrinsics for builtin ArrayBuffer property accesses

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 39 matching lines @@
 
 // ES6 Draft 15.13.5.5.3
 function ArrayBufferSlice(start, end) {
   if (!IS_ARRAYBUFFER(this)) {
     throw MakeTypeError('incompatible_method_receiver',
                         ['ArrayBuffer.prototype.slice', this]);
   }
 
   var relativeStart = TO_INTEGER(start);
   var first;
+  var byte_length = %ArrayBufferGetByteLength(this);
   if (relativeStart < 0) {
-    first = MathMax(this.byteLength + relativeStart, 0);
+    first = MathMax(byte_length + relativeStart, 0);
   } else {
-    first = MathMin(relativeStart, this.byteLength);
+    first = MathMin(relativeStart, byte_length);
   }
-  var relativeEnd = IS_UNDEFINED(end) ? this.byteLength : TO_INTEGER(end);
+  var relativeEnd = IS_UNDEFINED(end) ? byte_length : TO_INTEGER(end);
   var fin;
   if (relativeEnd < 0) {
-    fin = MathMax(this.byteLength + relativeEnd, 0);
+    fin = MathMax(byte_length + relativeEnd, 0);
   } else {
-    fin = MathMin(relativeEnd, this.byteLength);
+    fin = MathMin(relativeEnd, byte_length);
   }
 
   if (fin < first) {
     fin = first;
   }
   var newLen = fin - first;
   // TODO(dslomov): implement inheritance
   var result = new $ArrayBuffer(newLen);
 
   %ArrayBufferSliceImpl(this, result, first);
@@ skipping 19 matching lines @@
   InstallFunctions($ArrayBuffer, DONT_ENUM, $Array(
       "isView", ArrayBufferIsView
   ));
 
   InstallFunctions($ArrayBuffer.prototype, DONT_ENUM, $Array(
       "slice", ArrayBufferSlice
   ));
 }
 
 SetUpArrayBuffer();