Fix an assert in the parser that fails if extensions code using 'eval'...

src/d8.js

 // Copyright 2008 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 1125 matching lines @@
   return details;
 };
 
 
 /**
  * Protocol packages send from the debugger.
  * @param {string} json - raw protocol packet as JSON string.
  * @constructor
  */
 function ProtocolPackage(json) {
-  this.packet_ = eval('(' + json + ')');
+  this.packet_ = JSON.parse(json);
   this.refs_ = [];
   if (this.packet_.refs) {
     for (var i = 0; i < this.packet_.refs.length; i++) {
       this.refs_[this.packet_.refs[i].handle] = this.packet_.refs[i];
     }
   }
 }
 
 
 /**
@@ skipping 454 matching lines @@
       json += NumberToJSON_(elem);
     } else if (typeof(elem) === 'string')  {
       json += StringToJSON_(elem);
     } else {
       json += elem;
     }
   }
   json += ']';
   return json;
 }