[DevTools] Remove Common.Event.target field.

third_party/WebKit/Source/devtools/front_end/sdk/DOMModel.js

 /*
  * Copyright (C) 2009, 2010 Google Inc. All rights reserved.
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * 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.
@@ skipping 1352 matching lines @@
 
   /**
    * @param {?Protocol.DOM.Node} payload
    */
   _setDocument(payload) {
     this._idToDOMNode = {};
     if (payload && 'nodeId' in payload)
       this._document = new SDK.DOMDocument(this, payload);
     else
       this._document = null;
-    this.dispatchEventToListeners(SDK.DOMModel.Events.DocumentUpdated, this._document);
+    this.dispatchEventToListeners(SDK.DOMModel.Events.DocumentUpdated, this);
   }
 
   /**
    * @param {!Protocol.DOM.Node} payload
    */
   _setDetachedRoot(payload) {
     if (payload.nodeName === '#document')
       new SDK.DOMDocument(this, payload);
     else
       SDK.DOMNode.create(this, null, false, payload);
@@ skipping 337 matching lines @@
   /**
    * @param {!Protocol.DOM.InspectMode} mode
    * @param {function(?Protocol.Error)=} callback
    */
   setInspectMode(mode, callback) {
     /**
      * @this {SDK.DOMModel}
      */
     function onDocumentAvailable() {
       this._inspectModeEnabled = mode !== Protocol.DOM.InspectMode.None;
-      this.dispatchEventToListeners(SDK.DOMModel.Events.InspectModeWillBeToggled, this._inspectModeEnabled);
+      this.dispatchEventToListeners(SDK.DOMModel.Events.InspectModeWillBeToggled, this);
       this._highlighter.setInspectMode(mode, this._buildHighlightConfig(), callback);
     }
     this.requestDocument(onDocumentAvailable.bind(this));
   }
 
   /**
    * @return {boolean}
    */
   inspectModeEnabled() {
     return this._inspectModeEnabled;
@@ skipping 420 matching lines @@
   /**
    * @override
    * @param {!Protocol.Page.FrameId} frameId
    */
   highlightFrame(frameId) {
     this._agent.highlightFrame(
         frameId, Common.Color.PageHighlight.Content.toProtocolRGBA(),
         Common.Color.PageHighlight.ContentOutline.toProtocolRGBA());
   }
 };