DevTools: [Console] "Show all messages" checkbox is visible only if a few targets are available

Source/devtools/front_end/console/ConsoleView.js

 /*
  * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
  * 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
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 94 matching lines @@
     this._currentGroup = this._topGroup;
 
     this._promptElement = this._messagesElement.createChild("div", "source-code");
     this._promptElement.id = "console-prompt";
     this._promptElement.spellcheck = false;
 
     this._showAllMessagesCheckbox = new WebInspector.StatusBarCheckbox(WebInspector.UIString("Show all messages"));
     this._showAllMessagesCheckbox.inputElement.checked = true;
     this._showAllMessagesCheckbox.inputElement.addEventListener("change", this._updateMessageList.bind(this), false);
 
-    if (!WebInspector.experimentsSettings.workersInMainWindow.isEnabled())
-        this._showAllMessagesCheckbox.element.classList.add("hidden");
+    this._showAllMessagesCheckbox.element.classList.add("hidden");
 
     statusBarElement.appendChild(this._showAllMessagesCheckbox.element);
 
     this._registerShortcuts();
 
     this._messagesElement.addEventListener("contextmenu", this._handleContextMenuEvent.bind(this), false);
     WebInspector.settings.monitoringXHREnabled.addChangeListener(this._monitoringXHREnabledSettingChanged, this);
 
     this._linkifier = new WebInspector.Linkifier();
 
@@ skipping 70 matching lines @@
         return 16;
     },
 
     /**
      * @param {!WebInspector.Target} target
      */
     targetAdded: function(target)
     {
         this._viewport.invalidate();
         target.runtimeModel.executionContexts().forEach(this._executionContextCreated, this);
+        if (WebInspector.targetManager.targets().length > 1)
+            this._showAllMessagesCheckbox.element.classList.toggle("hidden", false);
     },
 
     /**
      * @param {!WebInspector.Target} target
      */
     targetRemoved: function(target)
     {
         this._clearExecutionContextsForTarget(target);
     },
 
@@ skipping 998 matching lines @@
 WebInspector.ConsoleView.ShowConsoleActionDelegate.prototype = {
     /**
      * @return {boolean}
      */
     handleAction: function()
     {
         WebInspector.console.show();
         return true;
     }
 }