[DevTools] Add Toolbox page to undocked DevTools frontend.

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 31 matching lines @@
         ],
         'devtools_core_base_js_files': [
             'front_end/inspector.html',
             'front_end/Tests.js',
             'front_end/EditFileSystemDialog.js',
             'front_end/ForwardedInputEventHandler.js',
             'front_end/InspectorFrontendAPI.js',
             'front_end/InspectorFrontendEventSink.js',
             'front_end/InspectorFrontendHostStub.js',
             'front_end/jsdifflib.js',
-            'front_end/ResponsiveDesignView.js',
             'front_end/ScreencastView.js',
             'front_end/SettingsScreen.js',
             'front_end/TestController.js',
             'front_end/dialog.css',
             'front_end/inspector.css',
             'front_end/tabbedPane.css',
             'front_end/inspectorSyntaxHighlight.css',
             'front_end/popover.css',
             '<@(devtools_main_js_files)',
             '<@(devtools_standalone_files)',
@@ skipping 138 matching lines @@
             'front_end/components/ObjectPopoverHelper.js',
             'front_end/components/ObjectPropertiesSection.js',
             '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/SettingsUI.js',
             'front_end/components/ShortcutsScreen.js',
             'front_end/components/TimelineGrid.js',
+            'front_end/components/Toolbox.js',
             'front_end/components/WorkerFrontendManager.js',
         ],
+        'devtools_toolbox_js_files': [
+            'front_end/toolbox/ResponsiveDesignView.js',
+        ],
         'devtools_main_js_files': [
             'front_end/main/HelpScreenUntilReload.js',
             'front_end/main/Main.js',
         ],
         'devtools_module_json_files': [
             'front_end/audits/module.json',
             'front_end/components/module.json',
             'front_end/console/module.json',
             'front_end/devices/module.json',
             'front_end/elements/module.json',
@@ skipping 327 matching lines @@
             'front_end/temp_storage_shared_worker/TempStorageSharedWorker.js',
         ],
         'devtools_script_formatter_worker_js_files': [
             'front_end/script_formatter_worker/CSSFormatter.js',
             'front_end/script_formatter_worker/JavaScriptFormatter.js',
             'front_end/script_formatter_worker/ScriptFormatterWorker.js',
             'front_end/common/utilities.js',
         ],
     },
 }