[DevTools] Remove Common.Event.target field.

third_party/WebKit/Source/devtools/front_end/sources/ScriptFormatterEditorAction.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 /**
  * @implements {Bindings.DebuggerSourceMapping}
  * @unrestricted
  */
 Sources.FormatterScriptMapping = class {
   /**
    * @param {!SDK.DebuggerModel} debuggerModel
@@ skipping 275 matching lines @@
         this._formatData.remove(uiSourceCodes[i]);
         this._project.removeFile(uiSourceCodes[i].url());
       }
     }
   }
 
   /**
    * @param {!Common.Event} event
    */
   _debuggerReset(event) {
-    var debuggerModel = /** @type {!SDK.DebuggerModel} */ (event.target);
+    var debuggerModel = /** @type {!SDK.DebuggerModel} */ (event.data);
     this._cleanForTarget(debuggerModel.target());
   }
 
   /**
    * @param {!Workspace.UISourceCode} uiSourceCode
    * @return {!Array.<!SDK.Script>}
    */
   _scriptsForUISourceCode(uiSourceCode) {
     /**
      * @param {!SDK.Script} script
@@ skipping 74 matching lines @@
       var targets = SDK.targetManager.targets();
       for (var i = 0; i < targets.length; ++i) {
         var scriptMapping =
             /** @type {!Sources.FormatterScriptMapping} */ (this._scriptMappingByTarget.get(targets[i]));
         Bindings.debuggerWorkspaceBinding.setSourceMapping(targets[i], formattedUISourceCode, scriptMapping);
       }
       this._showIfNeeded(uiSourceCode, formattedUISourceCode, formatterMapping);
     }
   }
 };