Add %TypedArray% to proto chain

test/mjsunit/harmony/sharedarraybuffer.js

Index: test/mjsunit/harmony/sharedarraybuffer.js
diff --git a/test/mjsunit/harmony/sharedarraybuffer.js b/test/mjsunit/harmony/sharedarraybuffer.js
index bac42681ab32fd1f521b976e65c96fbb79b2cd2a..cdbf102e87bcf70de5070149f42c958aff6fe122 100644
--- a/test/mjsunit/harmony/sharedarraybuffer.js
+++ b/test/mjsunit/harmony/sharedarraybuffer.js
@@ -87,6 +87,14 @@ function MakeSharedTypedArray(constr, numElements) {
   return new constr(sab);
 }
 
+function getPropertyDescriptor(object, field, expectedDepth) {
+  for (var depth = 0; depth < expectedDepth; depth++) {
+    assertFalse(Object.hasOwnProperty(object, field));
+    object = object.__proto__;
+  }
+  return Object.getOwnPropertyDescriptor(object, field);
+}
+
 function TestTypedArray(constr, elementSize, typicalElement) {
   assertSame(elementSize, constr.BYTES_PER_ELEMENT);
 
@@ -203,8 +211,7 @@ function TestTypedArray(constr, elementSize, typicalElement) {
   var a = new constr(sab, 64*elementSize, 128);
   assertEquals("[object " + constr.name + "]",
       Object.prototype.toString.call(a));
-  var desc = Object.getOwnPropertyDescriptor(
-      constr.prototype, Symbol.toStringTag);
+  var desc = getPropertyDescriptor(constr.prototype, Symbol.toStringTag, 1);
   assertTrue(desc.configurable);
   assertFalse(desc.enumerable);
   assertFalse(!!desc.writable);
@@ -310,17 +317,13 @@ var typedArrayConstructors = [
 
 function TestPropertyTypeChecks(constructor) {
   function CheckProperty(name) {
-    var d = Object.getOwnPropertyDescriptor(constructor.prototype, name);
+    var d = getPropertyDescriptor(constructor.prototype, name, 1);
     var o = {};
     assertThrows(function() {d.get.call(o);}, TypeError);
     for (var i = 0; i < typedArrayConstructors.length; i++) {
       var ctor = typedArrayConstructors[i];
       var a = MakeSharedTypedArray(ctor, 10);
-      if (ctor === constructor) {
-        d.get.call(a); // shouldn't throw
-      } else {
-        assertThrows(function() {d.get.call(a);}, TypeError);
-      }
+      d.get.call(a); // shouldn't throw on any type
     }
   }