Update ObjectToString to Harmony-draft algorithm

test/mjsunit/harmony/typedarrays.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 34 matching lines @@
   assertThrows(function() { new ArrayBuffer(-2.567); }, RangeError);
 
 /* TODO[dslomov]: Reenable the test
   assertThrows(function() {
     var ab1 = new ArrayBuffer(0xFFFFFFFFFFFF)
   }, RangeError);
 */
 
   var ab = new ArrayBuffer();
   assertSame(0, ab.byteLength);
+  assertEquals("[object ArrayBuffer]",
+      Object.prototype.toString.call(ab));
 }
 
 TestArrayBufferCreation();
 
 function TestByteLengthNotWritable() {
   var ab = new ArrayBuffer(1024);
   assertSame(1024, ab.byteLength);
 
   assertThrows(function() { "use strict"; ab.byteLength = 42; }, TypeError);
 }
@@ skipping 51 matching lines @@
 TestArrayBufferSlice();
 
 // Typed arrays
 
 function TestTypedArray(constr, elementSize, typicalElement) {
   assertSame(elementSize, constr.BYTES_PER_ELEMENT);
 
   var ab = new ArrayBuffer(256*elementSize);
 
   var a0 = new constr(30);
+  assertEquals("[object " + constr.name + "]",
+      Object.prototype.toString.call(a0));
+
   assertTrue(ArrayBuffer.isView(a0));
   assertSame(elementSize, a0.BYTES_PER_ELEMENT);
   assertSame(30, a0.length);
   assertSame(30*elementSize, a0.byteLength);
   assertSame(0, a0.byteOffset);
   assertSame(30*elementSize, a0.buffer.byteLength);
 
   var aLen0 = new constr(0);
   assertSame(elementSize, aLen0.BYTES_PER_ELEMENT);
   assertSame(0, aLen0.length);
@@ skipping 444 matching lines @@
 TestArbitrary(new ArrayBuffer(256));
 for(i = 0; i < typedArrayConstructors.lenght; i++) {
   TestArbitary(new typedArrayConstructors[i](10));
 }
 TestArbitrary(new DataView(new ArrayBuffer(256)));
 
 
 // Test direct constructor call
 assertThrows(function() { ArrayBuffer(); }, TypeError);
 assertThrows(function() { DataView(new ArrayBuffer()); }, TypeError);