[DevTools]: Require explicit connection

third_party/WebKit/Source/devtools/front_end/sources/SourcesPanel.js

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 104 matching lines @@
     WebInspector.context.addFlavorChangeListener(WebInspector.DebuggerModel.CallFrame, this._callFrameChanged, this);
     WebInspector.targetManager.addModelListener(
         WebInspector.DebuggerModel, WebInspector.DebuggerModel.Events.DebuggerWasEnabled, this._debuggerWasEnabled,
         this);
     WebInspector.targetManager.addModelListener(
         WebInspector.DebuggerModel, WebInspector.DebuggerModel.Events.DebuggerPaused, this._debuggerPaused, this);
     WebInspector.targetManager.addModelListener(
         WebInspector.DebuggerModel, WebInspector.DebuggerModel.Events.DebuggerResumed, this._debuggerResumed, this);
     WebInspector.targetManager.addModelListener(
         WebInspector.DebuggerModel, WebInspector.DebuggerModel.Events.GlobalObjectCleared, this._debuggerReset, this);
+    WebInspector.targetManager.addModelListener(
+        WebInspector.SubTargetsManager, WebInspector.SubTargetsManager.Events.PendingTargetAdded, this._pendingTargetAdded, this);
     new WebInspector.WorkspaceMappingTip(this, this._workspace);
     WebInspector.extensionServer.addEventListener(
         WebInspector.ExtensionServer.Events.SidebarPaneAdded, this._extensionSidebarPaneAdded, this);
     WebInspector.DataSaverInfobar.maybeShowInPanel(this);
     WebInspector.targetManager.observeTargets(this);
   }
 
   /**
    * @return {!WebInspector.SourcesPanel}
    */
@@ skipping 23 matching lines @@
       else
         panel._sourcesView.bottomToolbar().appendToolbarItem(panel._toggleDebuggerSidebarButton);
     }
   }
 
   /**
    * @override
    * @param {!WebInspector.Target} target
    */
   targetAdded(target) {
-    var hasThreads = WebInspector.targetManager.targets(WebInspector.Target.Capability.JS).length > 1;
-    if (hasThreads && !this._threadsSidebarPane) {
-      this._threadsSidebarPane = /** @type {!WebInspector.View} */ (WebInspector.viewManager.view('sources.threads'));
-      if (this._sidebarPaneStack) {
-        this._sidebarPaneStack.showView(
-            this._threadsSidebarPane, this._splitWidget.isVertical() ? this._watchSidebarPane : this._callstackPane);
-      }
-    }
+    this._showThreadsIfNeeded();
   }
 
   /**
    * @override
    * @param {!WebInspector.Target} target
    */
   targetRemoved(target) {
   }
 
+  _pendingTargetAdded() {
+    this._showThreadsIfNeeded();
+  }
+
+  _showThreadsIfNeeded() {
+    if (WebInspector.ThreadsSidebarPane.shouldBeShown() && !this._threadsSidebarPane) {
+      this._threadsSidebarPane = /** @type {!WebInspector.View} */ (WebInspector.viewManager.view('sources.threads'));
+      if (this._sidebarPaneStack)
+        this._sidebarPaneStack.showView(this._threadsSidebarPane, this._splitWidget.isVertical() ? this._watchSidebarPane : this._callstackPane);
+    }
+  }
+
+
   /**
    * @param {?WebInspector.Target} target
    */
   _setTarget(target) {
     if (!target)
       return;
     var debuggerModel = WebInspector.DebuggerModel.fromTarget(target);
     if (!debuggerModel)
       return;
 
@@ skipping 1146 matching lines @@
    */
   willHide() {
     WebInspector.inspectorView.setDrawerMinimized(false);
     setImmediate(() => WebInspector.SourcesPanel.updateResizerAndSidebarButtons(WebInspector.SourcesPanel.instance()));
   }
 
   _showViewInWrapper() {
     this._view.show(this.element);
   }
 };