DevTools: Remove target function from TimelineModel

Source/devtools/front_end/timeline/TimelineModelImpl.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.
 
 /**
  * @constructor
  * @extends {WebInspector.TimelineModel}
  * @param {!WebInspector.TimelineManager} timelineManager
  */
 WebInspector.TimelineModelImpl = function(timelineManager)
 {
-    WebInspector.TimelineModel.call(this, timelineManager.target());
+    WebInspector.TimelineModel.call(this);
+    this._target = timelineManager.target();
     this._timelineManager = timelineManager;
     this._filters = [];
     this._bindings = new WebInspector.TimelineModelImpl.InterRecordBindings();
 
     this.reset();
 
     this._timelineManager.addEventListener(WebInspector.TimelineManager.EventTypes.TimelineEventRecorded, this._onRecordAdded, this);
     this._timelineManager.addEventListener(WebInspector.TimelineManager.EventTypes.TimelineStarted, this._onStarted, this);
     this._timelineManager.addEventListener(WebInspector.TimelineManager.EventTypes.TimelineStopped, this._onStopped, this);
     this._timelineManager.addEventListener(WebInspector.TimelineManager.EventTypes.TimelineProgress, this._onProgress, this);
@@ skipping 365 matching lines @@
     initiator: function()
     {
         return this._initiator;
     },
 
     /**
      * @return {!WebInspector.Target}
      */
     target: function()
     {
-        return this._model.target();
+        return this._model._target;
     },
 
     /**
      * @return {number}
      */
     selfTime: function()
     {
         return this._selfTime;
     },
 
@@ skipping 292 matching lines @@
                 break;
             length += itemLength;
             data.push(item);
             ++this._recordIndex;
         }
         if (this._recordIndex === this._payloads.length)
             data.push(data.pop() + "]");
         stream.write(data.join(separator), this._writeNextChunk.bind(this));
     }
 }