Files.app: Remove the ButterBar class.

chrome/browser/resources/file_manager/foreground/js/main_scripts.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // The include directives are put into Javascript-style comments to prevent
 // parsing errors in non-flattened mode. The flattener still sees them.
 // Note that this makes the flattener to comment out the first line of the
 // included file but that's all right since any javascript file should start
 // with a copyright comment anyway.
 
@@ skipping 61 matching lines @@
 //<include src="../../common/js/async_util.js"/>
 //<include src="../../common/js/path_util.js"/>
 //<include src="../../common/js/util.js"/>
 //<include src="../../common/js/progress_center_common.js">
 //
 //<include src="combobutton.js"/>
 //<include src="commandbutton.js"/>
 //<include src="ui/file_manager_dialog_base.js"/>
 //
 //<include src="app_installer.js"/>
-//<include src="butter_bar.js"/>
 //<include src="cws_container_client.js"/>
 //<include src="directory_contents.js"/>
 //<include src="directory_model.js"/>
 //<include src="directory_tree.js"/>
 //<include src="drag_selector.js"/>
 //<include src="drive_banners.js" />
 //<include src="error_dialog.js"/>
 //<include src="file_operation_manager_wrapper.js"/>
 //<include src="file_grid.js"/>
 //<include src="file_manager.js"/>
@@ skipping 32 matching lines @@
 // Global fileManager reference useful for poking at from the console.
 window.fileManager = fileManager;
 
 // Exports
 window.util = util;
 window.FileOperationManagerWrapper = FileOperationManagerWrapper;
 
 window.unload = unload;
 
 })();