[DevTools] Support for the inspector target type

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 307 matching lines @@
         console.timeStamp("Main._mainTargetCreated");
         this._registerShortcuts();
 
         this._mainTarget.registerInspectorDispatcher(this);
         InspectorFrontendHost.events.addEventListener(InspectorFrontendHostAPI.Events.ReloadInspectedPage, this._reloadInspectedPage, this);
         InspectorFrontendHost.events.addEventListener(InspectorFrontendHostAPI.Events.EvaluateForTestInFrontend, this._evaluateForTestInFrontend, this);
 
         if (this._mainTarget.isServiceWorker() || this._mainTarget.isPage() || this._mainTarget.isJSInspector())
             this._mainTarget.runtimeAgent().run();
 
-        this._mainTarget.inspectorAgent().enable();
+        if (!this._mainTarget.isJSInspector())

[pfeldman, 2016/07/07 18:00:49]

Lets steer it closer to capabilities. I.e. the checks should not be negative.

+            this._mainTarget.inspectorAgent().enable();
         InspectorFrontendHost.readyForTest();
 
         // Asynchronously run the extensions.
         setTimeout(lateInitialization, 0);
 
         function lateInitialization()
         {
             console.timeStamp("Main.lateInitialization");
             WebInspector.extensionServer.initializeExtensions();
         }
@@ skipping 778 matching lines @@
      * @return {?Element}
      */
     settingElement: function()
     {
         return WebInspector.SettingsUI.createSettingCheckbox(WebInspector.UIString("Show rulers"), WebInspector.moduleSetting("showMetricsRulers"));
     }
 }
 
 
 new WebInspector.Main();