[DevTools] Remove Common.Event.target field.

third_party/WebKit/Source/devtools/front_end/sources/TabbedEditorContainer.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:
  *
  * 1. Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *
@@ skipping 530 matching lines @@
         var binding = Persistence.persistence.binding(uiSourceCode);
         this._tabbedPane.setTabIcon(
             tabId, 'smallicon-green-checkmark',
             Persistence.PersistenceUtils.tooltipForUISourceCode(binding.fileSystem));
       } else {
         this._tabbedPane.setTabIcon(tabId, '');
       }
     }
   }
 
+  /**
+   * @param {!Common.Event} event
+   */
   _uiSourceCodeTitleChanged(event) {
-    var uiSourceCode = /** @type {!Workspace.UISourceCode} */ (event.target);
+    var uiSourceCode = /** @type {!Workspace.UISourceCode} */ (event.data);
     this._updateFileTitle(uiSourceCode);
     this._updateHistory();
   }
 
+  /**
+   * @param {!Common.Event} event
+   */
   _uiSourceCodeWorkingCopyChanged(event) {
-    var uiSourceCode = /** @type {!Workspace.UISourceCode} */ (event.target);
+    var uiSourceCode = /** @type {!Workspace.UISourceCode} */ (event.data);
     this._updateFileTitle(uiSourceCode);
   }
 
+  /**
+   * @param {!Common.Event} event
+   */
   _uiSourceCodeWorkingCopyCommitted(event) {
-    var uiSourceCode = /** @type {!Workspace.UISourceCode} */ (event.target);
+    var uiSourceCode = /** @type {!Workspace.UISourceCode} */ (event.data.uiSourceCode);
     this._updateFileTitle(uiSourceCode);
   }
 
   /**
    * @return {string}
    */
   _generateTabId() {
     return 'tab_' + (Sources.TabbedEditorContainer._tabId++);
   }
 
@@ skipping 229 matching lines @@
 
   /**
    * @override
    * @param {string} tabId
    * @param {!UI.ContextMenu} contextMenu
    */
   onContextMenu(tabId, contextMenu) {
     this._editorContainer._onContextMenu(tabId, contextMenu);
   }
 };