Revert 221619 "Initial chrome.mdns API."

trunk/src/chrome/renderer/resources/extensions/event.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
   var eventNatives = requireNative('event_natives');
   var logging = requireNative('logging');
   var schemaRegistry = requireNative('schema_registry');
   var sendRequest = require('sendRequest').sendRequest;
   var utils = require('utils');
   var validate = require('schemaUtils').validate;
@@ skipping 210 matching lines @@
   // its listeners.
   function registerArgumentMassager(name, callback) {
     if (eventArgumentMassagers[name])
       throw new Error("Massager already registered for event: " + name);
     eventArgumentMassagers[name] = callback;
   }
 
   // Dispatches a named event with the given argument array. The args array is
   // the list of arguments that will be sent to the event callback.
   function dispatchEvent(name, args, filteringInfo) {
-    var listenerIDs = [];
+    var listenerIDs = null;
 
     if (filteringInfo)
       listenerIDs = eventNatives.MatchAgainstEventFilter(name, filteringInfo);
 
     var event = attachedNamedEvents[name];
     if (!event)
       return;
 
     var dispatchArgs = function(args) {
       var result = event.dispatch_(args, listenerIDs);
@@ skipping 13 matching lines @@
     if (!this.eventOptions_.supportsListeners)
       throw new Error("This event does not support listeners.");
     if (this.eventOptions_.maxListeners &&
         this.getListenerCount() >= this.eventOptions_.maxListeners) {
       throw new Error("Too many listeners for " + this.eventName_);
     }
     if (filters) {
       if (!this.eventOptions_.supportsFilters)
         throw new Error("This event does not support filters.");
       if (filters.url && !(filters.url instanceof Array))
-        throw new Error("filters.url should be an array.");
-      if (filters.serviceType &&
-          !(typeof filters.serviceType === 'string')) {
-        throw new Error("filters.serviceType should be a string.")
-      }
+        throw new Error("filters.url should be an array");
     }
     var listener = {callback: cb, filters: filters};
     this.attach_(listener);
     $Array.push(this.listeners_, listener);
   };
 
   Event.prototype.attach_ = function(listener) {
     this.attachmentStrategy_.onAddedListener(listener);
 
     if (this.listeners_.length == 0) {
@@ skipping 210 matching lines @@
         event.detach_();
     }
   });
 
   // NOTE: Event is (lazily) exposed as chrome.Event from dispatcher.cc.
   exports.Event = Event;
 
   exports.dispatchEvent = dispatchEvent;
   exports.parseEventOptions = parseEventOptions;
   exports.registerArgumentMassager = registerArgumentMassager;