DevTools: always use CodeMirror for response preview

third_party/WebKit/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 570 matching lines @@
             'front_end/settings/frameworkBlackboxSettingsTab.css',
             'front_end/settings/settingsScreen.css',
             'front_end/settings/EditFileSystemView.js',
             'front_end/settings/FrameworkBlackboxSettingsTab.js',
             'front_end/settings/SettingsScreen.js',
         ],
         'devtools_source_frame_js_files': [
             'front_end/source_frame/cmdevtools.css',
             'front_end/source_frame/fontView.css',
             'front_end/source_frame/imageView.css',
-            'front_end/source_frame/resourceSourceFrame.css',
             'front_end/source_frame/CodeMirrorDictionary.js',
             'front_end/source_frame/CodeMirrorTextEditor.js',
             'front_end/source_frame/CodeMirrorUtils.js',
             'front_end/source_frame/FontView.js',
             'front_end/source_frame/ImageView.js',
             'front_end/source_frame/ResourceSourceFrame.js',
             'front_end/source_frame/SourceFrame.js',
             'front_end/source_frame/TextEditorAutocompleteController.js',
         ],
         'devtools_sources_js_files': [
@@ skipping 220 matching lines @@
             'front_end/Images/toolbarItemSelected.png',
             'front_end/Images/touchCursor.png',
             'front_end/Images/touchCursor_2x.png',
             'front_end/Images/updateServiceWorker.svg',
         ],
         'devtools_extension_api_files': [
             'front_end/extensions/ExtensionAPI.js',
         ],
     },
 }