[DevTools] Remove Common.Event.target field.

third_party/WebKit/Source/devtools/front_end/profiler/HeapSnapshotView.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 422 matching lines @@
 
   /**
    * @param {!UI.ContextMenu} contextMenu
    * @param {!Event} event
    */
   populateContextMenu(contextMenu, event) {
     if (this._dataGrid)
       this._dataGrid.populateContextMenu(contextMenu, event);
   }
 
+  /**
+   * @param {!Common.Event} event
+   */
   _selectionChanged(event) {
-    var selectedNode = event.target.selectedNode;
+    var selectedNode = /** @type {!Profiler.HeapSnapshotGridNode} */ (event.data);
     this._setSelectedNodeForDetailsView(selectedNode);
     this._inspectedObjectChanged(event);
   }
 
+  /**
+   * @param {!Common.Event} event
+   */
   _onSelectAllocationNode(event) {
-    var selectedNode = event.target.selectedNode;
+    var selectedNode = /** @type {!UI.DataGridNode} */ (event.data);
     this._constructorsDataGrid.setAllocationNodeId(selectedNode.allocationNodeId());
     this._setSelectedNodeForDetailsView(null);
   }
 
+  /**
+   * @param {!Common.Event} event
+   */
   _inspectedObjectChanged(event) {
-    var selectedNode = event.target.selectedNode;
+    var selectedNode = /** @type {!UI.DataGridNode} */ (event.data);
     var target = this._profile.target();
     if (target && selectedNode instanceof Profiler.HeapSnapshotGenericObjectNode)
       target.heapProfilerAgent().addInspectedHeapObject(String(selectedNode.snapshotNodeId));
   }
 
   /**
    * @param {?Profiler.HeapSnapshotGridNode} nodeItem
    */
   _setSelectedNodeForDetailsView(nodeItem) {
     var dataSource = nodeItem && nodeItem.retainersDataSource();
@@ skipping 1615 matching lines @@
       var name = frameDiv.createChild('div');
       name.textContent = UI.beautifyFunctionName(frame.functionName);
       if (frame.scriptId) {
         var urlElement = this._linkifier.linkifyScriptLocation(
             this._target, String(frame.scriptId), frame.scriptName, frame.line - 1, frame.column - 1);
         frameDiv.appendChild(urlElement);
       }
     }
   }
 };