DevTools: Implement CSS pretty-printing

Source/devtools/devtools.gyp

 #
 # 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 35 matching lines @@
             'front_end/ConsoleModel.js',
             'front_end/ConsolePanel.js',
             'front_end/ConsoleView.js',
             'front_end/ContentProvider.js',
             'front_end/ContentProviderBasedProjectDelegate.js',
             'front_end/ContentProviders.js',
             'front_end/ContextMenu.js',
             'front_end/CookieItemsView.js',
             'front_end/CookieParser.js',
             'front_end/CookiesTable.js',
+            'front_end/CSSFormatter.js',
             'front_end/CSSMetadata.js',
             'front_end/CSSStyleModel.js',
             'front_end/CSSStyleSheetMapping.js',
             'front_end/Database.js',
             'front_end/DataGrid.js',
             'front_end/DebuggerModel.js',
             'front_end/DebuggerScriptMapping.js',
             'front_end/DevToolsExtensionAPI.js',
             'front_end/Tests.js',
             'front_end/Dialog.js',
@@ skipping 862 matching lines @@
                         'destination': '<(PRODUCT_DIR)/resources/inspector',
                         'files': [
                             '<@(devtools_standalone_files)',
                         ],
                     }],
                 },
             ],
         }],
     ], # conditions
 }