Add remaining @@toStringTag symbols to builtins

src/math.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 "use strict";
 
 // This file relies on the fact that the following declarations have been made
 // in runtime.js:
 // var $Object = global.Object;
 
@@ skipping 303 matching lines @@
 
 // -------------------------------------------------------------------
 
 function SetUpMath() {
   %CheckIsBootstrapping();
 
   %InternalSetPrototype($Math, $Object.prototype);
   %AddNamedProperty(global, "Math", $Math, DONT_ENUM);
   %FunctionSetInstanceClassName(MathConstructor, 'Math');
 
+  %AddNamedProperty($Math, symbolToStringTag, "Math", READ_ONLY | DONT_ENUM);
+
   // Set up math constants.
   InstallConstants($Math, $Array(
     // ECMA-262, section 15.8.1.1.
     "E", 2.7182818284590452354,
     // ECMA-262, section 15.8.1.2.
     "LN10", 2.302585092994046,
     // ECMA-262, section 15.8.1.3.
     "LN2", 0.6931471805599453,
     // ECMA-262, section 15.8.1.4.
     "LOG2E", 1.4426950408889634,
@@ skipping 43 matching lines @@
     "expm1", MathExpm1    // implemented by third_party/fdlibm
   ));
 
   %SetInlineBuiltinFlag(MathCeil);
   %SetInlineBuiltinFlag(MathRandom);
   %SetInlineBuiltinFlag(MathSin);
   %SetInlineBuiltinFlag(MathCos);
 }
 
 SetUpMath();