DevTools: Remove target function from TimelineModel

Source/devtools/front_end/timeline/TimelinePaintProfilerView.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.SplitView}
  */
 WebInspector.TimelinePaintProfilerView = function()
 {
@@ skipping 18 matching lines @@
 WebInspector.TimelinePaintProfilerView.prototype = {
     wasShown: function()
     {
         if (this._updateWhenVisible) {
             this._updateWhenVisible = false;
             this._update();
         }
     },
 
     /**
-     * @param {!WeakReference.<!WebInspector.Target>} weakTarget
+     * @param {?WebInspector.Target} target
      * @param {string} encodedPicture
      */
-    setPicture: function(weakTarget, encodedPicture)
+    setPicture: function(target, encodedPicture)
     {
         this._disposeSnapshot();
         this._picture = encodedPicture;
-        this._weakTarget = weakTarget;
+        this._target = target;
         if (this.isShowing())
             this._update();
         else
             this._updateWhenVisible = true;
     },
 
     _update: function()
     {
-        var target = this._weakTarget.get();
-        if (!target)
+        if (!this._target)
             return;
-        WebInspector.PaintProfilerSnapshot.load(target, this._picture, onSnapshotLoaded.bind(this));
+        WebInspector.PaintProfilerSnapshot.load(this._target, this._picture, onSnapshotLoaded.bind(this));
         /**
          * @param {?WebInspector.PaintProfilerSnapshot} snapshot
          * @this WebInspector.TimelinePaintProfilerView
          */
         function onSnapshotLoaded(snapshot)
         {
             this._disposeSnapshot();
             this._lastLoadedSnapshot = snapshot;
             snapshot.commandLog(onCommandLogDone.bind(this, snapshot));
         }
@@ skipping 72 matching lines @@
      * @param {string=} imageURL
      */
     showImage: function(imageURL)
     {
         this._imageElement.classList.toggle("hidden", !imageURL);
         this._imageElement.src = imageURL;
     },
 
     __proto__: WebInspector.View.prototype
 };