DevTools: keep widgets in widget hierarchy upon hide, split attach/detach cycle from show/hide.

third_party/WebKit/Source/devtools/front_end/main/Main.js

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2007 Matt Lilek (pewtermoose@gmail.com).
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * 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
@@ skipping 1005 matching lines @@
 
 /**
  * @param {!WebInspector.DebuggerModel} debuggerModel
  */
 WebInspector.TargetCrashedScreen.show = function(debuggerModel)
 {
     var dialog = new WebInspector.Dialog();
     dialog.setWrapsContent(true);
     dialog.addCloseButton();
     dialog.setDimmed(true);
-    var hideBound = dialog.detach.bind(dialog, false);
+    var hideBound = dialog.detach.bind(dialog);
     debuggerModel.addEventListener(WebInspector.DebuggerModel.Events.GlobalObjectCleared, hideBound);
 
     new WebInspector.TargetCrashedScreen(onHide).show(dialog.element);
     dialog.show();
 
     function onHide()
     {
         debuggerModel.removeEventListener(WebInspector.DebuggerModel.Events.GlobalObjectCleared, hideBound);
     }
 }
@@ skipping 75 matching lines @@
      * @return {?Element}
      */
     settingElement: function()
     {
         return WebInspector.SettingsUI.createSettingCheckbox(WebInspector.UIString("Show rulers"), WebInspector.moduleSetting("showMetricsRulers"));
     }
 }
 
 
 new WebInspector.Main();