[DevTools] Remove unnecessary emulation checkboxes and simplify UX.

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 264 matching lines @@
         new WebInspector.PresentationConsoleMessageHelper(WebInspector.workspace);
         WebInspector.fileSystemWorkspaceBinding = new WebInspector.FileSystemWorkspaceBinding(WebInspector.isolatedFileSystemManager, WebInspector.workspace);
         WebInspector.breakpointManager = new WebInspector.BreakpointManager(WebInspector.settings.breakpoints, WebInspector.workspace, WebInspector.targetManager);
         WebInspector.scriptSnippetModel = new WebInspector.ScriptSnippetModel(WebInspector.workspace);
         this._executionContextSelector = new WebInspector.ExecutionContextSelector();
     },
 
     _doLoadedDoneWithCapabilities: function(mainTarget)
     {
         WebInspector.dockController = new WebInspector.DockController(!!WebInspector.queryParam("can_dock"));
+        WebInspector.overridesSupport = new WebInspector.OverridesSupport(WebInspector.experimentsSettings.responsiveDesign.isEnabled() && WebInspector.dockController.canDock());
 
         if (mainTarget.canScreencast)
             WebInspector.app = new WebInspector.ScreencastApp();
         else if (WebInspector.dockController.canDock())
             WebInspector.app = new WebInspector.AdvancedApp();
         else
             WebInspector.app = new WebInspector.SimpleApp();
 
         WebInspector.dockController.initialize();
 
@@ skipping 45 matching lines @@
         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);
 
-        WebInspector.overridesSupport = new WebInspector.OverridesSupport(WebInspector.experimentsSettings.responsiveDesign.isEnabled() && WebInspector.dockController.canDock());
-
         WebInspector.liveEditSupport = new WebInspector.LiveEditSupport(WebInspector.workspace);
         new WebInspector.CSSStyleSheetMapping(WebInspector.cssModel, WebInspector.workspace, WebInspector.networkWorkspaceBinding);
 
         // Create settings before loading modules.
         WebInspector.settings.initializeBackendSettings();
 
         this._registerModules();
         WebInspector.actionRegistry = new WebInspector.ActionRegistry();
         WebInspector.shortcutRegistry = new WebInspector.ShortcutRegistry(WebInspector.actionRegistry);
         this._registerForwardedShortcuts();
@@ skipping 460 matching lines @@
 });
 
 /**
  * @param {string} name
  * @return {?WebInspector.Panel}
  */
 WebInspector.panel = function(name)
 {
     return WebInspector.inspectorView.panel(name);
 }