DevTools: Decouple CSS model from UI entities

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 341 matching lines @@
             screen.showModal();
         }
 
         WebInspector.domBreakpointsSidebarPane = new WebInspector.DOMBreakpointsSidebarPane();
         var autoselectPanel = WebInspector.UIString("a panel chosen automatically");
         var openAnchorLocationSetting = WebInspector.settings.createSetting("openLinkHandler", autoselectPanel);
         WebInspector.openAnchorLocationRegistry = new WebInspector.HandlerRegistry(openAnchorLocationSetting);
         WebInspector.openAnchorLocationRegistry.registerHandler(autoselectPanel, function() { return false; });
         WebInspector.Linkifier.setLinkHandler(new WebInspector.HandlerRegistry.LinkHandler());
         new WebInspector.WorkspaceController(WebInspector.workspace);
-        new WebInspector.CSSStyleSheetMapping(WebInspector.cssModel, WebInspector.workspace, WebInspector.networkWorkspaceBinding);
         new WebInspector.RenderingOptions();
         new WebInspector.Main.PauseListener();
         new WebInspector.Main.InspectedNodeRevealer();
 
         this._addMainEventListeners(document);
 
         WebInspector.extensionServerProxy.setFrontendReady();
 
         InspectorAgent.enable(inspectorAgentEnableCallback);
 
@@ skipping 526 matching lines @@
 
 WebInspector.Main.InspectedNodeRevealer.prototype = {
     /**
      * @param {!WebInspector.Event} event
      */
     _inspectNode: function(event)
     {
         WebInspector.Revealer.reveal(/** @type {!WebInspector.DOMNode} */ (event.data));
     }
 }