DevTools: Refactor nits in DebuggerModel event dispatching.

Source/devtools/front_end/sdk/DebuggerModel.js

 /*
  * Copyright (C) 2010 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 352 matching lines @@
         this._reset();
         this.dispatchEventToListeners(WebInspector.DebuggerModel.Events.GlobalObjectCleared);
     },
 
     /**
      * @param {string} eventType
      * @param {!DebuggerAgent.PromiseDetails} promise
      */
     _promiseUpdated: function(eventType, promise)
     {
-        this.dispatchEventToListeners(WebInspector.DebuggerModel.Events.PromiseUpdated, { target: this.target(), eventType: eventType, promise: promise });
+        this.dispatchEventToListeners(WebInspector.DebuggerModel.Events.PromiseUpdated, { eventType: eventType, promise: promise });
     },
 
     /**
      * @param {!DebuggerAgent.AsyncOperation} operation
      */
     _asyncOperationStarted: function(operation)
     {
-        this.dispatchEventToListeners(WebInspector.DebuggerModel.Events.AsyncOperationStarted, { target: this.target(), operation: operation });
+        this.dispatchEventToListeners(WebInspector.DebuggerModel.Events.AsyncOperationStarted, operation);
     },
 
     /**
      * @param {number} operationId
      */
     _asyncOperationCompleted: function(operationId)
     {
-        this.dispatchEventToListeners(WebInspector.DebuggerModel.Events.AsyncOperationCompleted, { target: this.target(), operationId: operationId });
+        this.dispatchEventToListeners(WebInspector.DebuggerModel.Events.AsyncOperationCompleted, operationId);
     },
 
     _reset: function()
     {
         this._scripts = {};
         this._scriptsBySourceURL.clear();
     },
 
     /**
      * @return {!Object.<string, !WebInspector.Script>}
@@ skipping 826 matching lines @@
      */
     exception: function()
     {
         if (this.reason !== WebInspector.DebuggerModel.BreakReason.Exception && this.reason !== WebInspector.DebuggerModel.BreakReason.PromiseRejection)
             return null;
         return this.target().runtimeModel.createRemoteObject(/** @type {!RuntimeAgent.RemoteObject} */(this.auxData));
     },
 
     __proto__: WebInspector.SDKObject.prototype
 }