Revert of Use ES2015-style TypedArray prototype 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 7f7f8fb2d5ab89e1f9d3cad8f3cf048d7e831299..bac42681ab32fd1f521b976e65c96fbb79b2cd2a 100644
--- a/test/mjsunit/harmony/sharedarraybuffer.js
+++ b/test/mjsunit/harmony/sharedarraybuffer.js
@@ -204,7 +204,7 @@
   assertEquals("[object " + constr.name + "]",
       Object.prototype.toString.call(a));
   var desc = Object.getOwnPropertyDescriptor(
-      constr.prototype.__proto__, Symbol.toStringTag);
+      constr.prototype, Symbol.toStringTag);
   assertTrue(desc.configurable);
   assertFalse(desc.enumerable);
   assertFalse(!!desc.writable);
@@ -310,14 +310,17 @@
 
 function TestPropertyTypeChecks(constructor) {
   function CheckProperty(name) {
-    var d = Object.getOwnPropertyDescriptor(constructor.prototype.__proto__,
-                                            name);
+    var d = Object.getOwnPropertyDescriptor(constructor.prototype, name);
     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);
-      d.get.call(a); // shouldn't throw
+      if (ctor === constructor) {
+        d.get.call(a); // shouldn't throw
+      } else {
+        assertThrows(function() {d.get.call(a);}, TypeError);
+      }
     }
   }