[DevTools] Drop "ui" module from toolbox.

Source/devtools/devtools.gypi

 #
 # Copyright (C) 2013 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:
 #
 #         * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #         * Redistributions in binary form must reproduce the above
@@ skipping 104 matching lines @@
             'front_end/components/OverviewGrid.js',
             'front_end/components/Panel.js',
             'front_end/components/PropertiesSection.js',
             'front_end/components/SearchableView.js',
             'front_end/components/Section.js',
             'front_end/components/ShortcutsScreen.js',
             'front_end/components/TargetsComboBoxController.js',
             'front_end/components/TimelineGrid.js',
         ],
         'devtools_host_js_files': [
+            'front_end/host/DOMExtension.js',
             'front_end/host/InspectorFrontendHost.js',
             'front_end/host/Platform.js',
             'front_end/host/ToolboxHost.js',
             'front_end/host/UserMetrics.js',
         ],
         'devtools_screencast_js_files': [
             'front_end/screencast/screencastView.css',
             'front_end/screencast/ScreencastView.js',
         ],
         'devtools_sdk_js_files': [
@@ skipping 84 matching lines @@
             'front_end/ui/dataGrid.css',
             'front_end/ui/filter.css',
             'front_end/ui/pieChart.css',
             'front_end/ui/ActionRegistry.js',
             'front_end/ui/Checkbox.js',
             'front_end/ui/CompletionDictionary.js',
             'front_end/ui/Context.js',
             'front_end/ui/ContextMenu.js',
             'front_end/ui/DataGrid.js',
             'front_end/ui/Dialog.js',
-            'front_end/ui/DOMExtension.js',
             'front_end/ui/DOMSyntaxHighlighter.js',
             'front_end/ui/DropDownMenu.js',
             'front_end/ui/EmptyView.js',
             'front_end/ui/ForwardedInputEventHandler.js',
             'front_end/ui/InplaceEditor.js',
             'front_end/ui/KeyboardShortcut.js',
             'front_end/ui/PieChart.js',
             'front_end/ui/Popover.js',
             'front_end/ui/ProgressIndicator.js',
             'front_end/ui/ResizerWidget.js',
@@ skipping 415 matching lines @@
             'front_end/Images/touchCursor.png',
             'front_end/Images/touchCursor_2x.png',
             'front_end/Images/transformControls.png',
             'front_end/Images/transformControls_2x.png',
         ],
         'devtools_extension_api_files': [
             'front_end/extensions/ExtensionAPI.js',
         ],
     },
 }