DevTools: use setImmediate instead of setTimeout for dispatching messages on devtools frontend in d…

Source/devtools/front_end/externs.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 12 matching lines @@
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 // WebKit Web Facing API
 
+/**
+ * @param {!Object} object
+ * @param {!Function} callback
+ */
+Object.observe = function(object, callback) {}
+
 /** @type {boolean} */
 Event.prototype.isMetaOrCtrlForTest;
 
 /**
  * @type {number}
  */
 KeyboardEvent.DOM_KEY_LOCATION_NUMPAD;
 
 /**
  * @param {string} eventName
@@ skipping 404 matching lines @@
  * @constructor
  * @extends {Event}
  */
 function ErrorEvent() {}
 
 /** @type {string} */
 ErrorEvent.prototype.message;
 
 /** @type {boolean} */
 window.dispatchStandaloneTestRunnerMessages;