[DevTools] Remove Common.Event.target field.

third_party/WebKit/Source/devtools/front_end/network/ResourceWebSocketFrameView.js

 /*
  * Copyright (C) 2012 Research In Motion Limited. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 90 matching lines @@
    */
   _frameAdded(event) {
     var frame = /** @type {!SDK.NetworkRequest.WebSocketFrame} */ (event.data);
     this._dataGrid.insertChild(new Network.ResourceWebSocketFrameNode(this._request.url, frame));
   }
 
   /**
    * @param {!Common.Event} event
    */
   _onFrameSelected(event) {
-    var selectedNode = /** @type {!Network.ResourceWebSocketFrameNode} */ (event.target.selectedNode);
+    var selectedNode = /** @type {!Network.ResourceWebSocketFrameNode} */ (event.data);
     this._currentSelectedNode = selectedNode;
     var contentProvider = selectedNode.contentProvider();
     contentProvider.requestContent().then(contentHandler.bind(this));
 
     /**
      * @param {(string|null)} content
      * @this {Network.ResourceWebSocketFrameView}
      */
     function contentHandler(content) {
       if (this._currentSelectedNode !== selectedNode)
@@ skipping 118 matching lines @@
 };
 
 /**
  * @param {!Network.ResourceWebSocketFrameNode} a
  * @param {!Network.ResourceWebSocketFrameNode} b
  * @return {number}
  */
 Network.ResourceWebSocketFrameNodeTimeComparator = function(a, b) {
   return a._frame.time - b._frame.time;
 };