DevTools: Get rid of WebInspector.TargetObserver

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 58 matching lines @@
     this._diffView = new WebInspector.VBox();
     this._diffView.setMinimumSize(50, 25);
 
     this._diffDataGrid = new WebInspector.HeapSnapshotDiffDataGrid(dataDisplayDelegate);
     this._diffDataGrid.show(this._diffView.element);
     this._diffDataGrid.addEventListener(WebInspector.DataGrid.Events.SelectedNode, this._selectionChanged, this);
 
     if (profile._hasAllocationStacks) {
         this._allocationView = new WebInspector.VBox();
         this._allocationView.setMinimumSize(50, 25);
-        this._allocationDataGrid = new WebInspector.AllocationDataGrid(profile.target() , dataDisplayDelegate);
+        this._allocationDataGrid = new WebInspector.AllocationDataGrid(profile.weakTarget() , dataDisplayDelegate);
         this._allocationDataGrid.addEventListener(WebInspector.DataGrid.Events.SelectedNode, this._onSelectAllocationNode, this);
         this._allocationDataGrid.show(this._allocationView.element);
 
-        this._allocationStackView = new WebInspector.HeapAllocationStackView(profile.target());
+        this._allocationStackView = new WebInspector.HeapAllocationStackView(profile.weakTarget());
         this._allocationStackView.setMinimumSize(50, 25);
 
         this._tabbedPane = new WebInspector.TabbedPane();
         this._tabbedPane.closeableTabs = false;
         this._tabbedPane.headerElement().classList.add("heap-object-details-header");
     }
 
     this._retainmentView = new WebInspector.VBox();
     this._retainmentView.setMinimumSize(50, 21);
     this._retainmentView.element.classList.add("retaining-paths-view");
@@ skipping 2027 matching lines @@
         nameDiv.textContent = name;
         sizeDiv.textContent = WebInspector.UIString("%s KB", Number.withThousandsSeparator(Math.round(value / 1024)));
     },
 
     __proto__: WebInspector.VBox.prototype
 }
 
 /**
  * @constructor
  * @extends {WebInspector.View}
- * @param {?WebInspector.Target} target
+ * @param {!WeakReference.<!WebInspector.Target>} weakTarget
  */
-WebInspector.HeapAllocationStackView = function(target)
+WebInspector.HeapAllocationStackView = function(weakTarget)
 {
     WebInspector.View.call(this);
-    this._targetObserver = new WebInspector.TargetObserver(target);
+    this._weakTarget = weakTarget;;
     this._linkifier = new WebInspector.Linkifier();
 }
 
 WebInspector.HeapAllocationStackView.prototype = {
     /**
      * @param {!WebInspector.HeapSnapshotProxy} snapshot
      * @param {number} snapshotNodeIndex
      */
     setAllocatedObject: function(snapshot, snapshotNodeIndex)
     {
@@ skipping 18 matching lines @@
             return;
         }
 
         var stackDiv = this.element.createChild("div", "heap-allocation-stack");
         for (var i = 0; i < frames.length; i++) {
             var frame = frames[i];
             var frameDiv = stackDiv.createChild("div", "stack-frame");
             var name = frameDiv.createChild("div");
             name.textContent = frame.functionName;
             if (frame.scriptId) {
-                var urlElement = this._linkifier.linkifyLocationByScriptId(this._targetObserver.target(), String(frame.scriptId), frame.scriptName, frame.line - 1, frame.column - 1);
+                var urlElement = this._linkifier.linkifyLocationByScriptId(this._weakTarget.get(), String(frame.scriptId), frame.scriptName, frame.line - 1, frame.column - 1);
                 frameDiv.appendChild(urlElement);
             }
         }
     },
 
     __proto__: WebInspector.View.prototype
 }