DevTools: Allow setting -0 value to object property

Source/devtools/front_end/ExtensionServer.js

 /*
  * Copyright (C) 2011 Google Inc. 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
@@ skipping 869 matching lines @@
                     return this._status.E_NOTFOUND(contextSecurityOrigin)
                 }
             } else {
                 context = frameContextList.mainWorldContext();
                 if (!context)
                     return this._status.E_FAILED(frame.url + " has no execution context");
             }
 
             contextId = context.id;
         }
-        RuntimeAgent.evaluate(expression, "extension", exposeCommandLineAPI, true, contextId, returnByValue, false, callback);
+        RuntimeAgent.evaluate(expression, "extension", exposeCommandLineAPI, true, contextId, returnByValue, false, false, callback);
     }
 }
 
 /**
  * @constructor
  */
 WebInspector.ExtensionStatus = function()
 {
     function makeStatus(code, description)
     {
@@ skipping 26 matching lines @@
 
 WebInspector.extensionServer = new WebInspector.ExtensionServer();
 
 window.addExtension = function(page, name)
 {
     WebInspector.extensionServer._addExtension({
         startPage: page,
         name: name,
     });
 }