[Mac] Remove BrowserCommandExecutor protocol.

chrome/chrome_browser_ui.gypi

 # Copyright 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.
 
 {
   'variables': {
     # There are two sections of sources:
     # * "Platform"-based sources (OS, toolkit, etc.)
     # * Feature/directory-based sources (e.g., history, printing)
 
@@ skipping 863 matching lines @@
       'browser/ui/cocoa/bookmarks/bookmark_name_folder_controller.h',
       'browser/ui/cocoa/bookmarks/bookmark_name_folder_controller.mm',
       'browser/ui/cocoa/bookmarks/bookmark_sync_promo_controller.h',
       'browser/ui/cocoa/bookmarks/bookmark_sync_promo_controller.mm',
       'browser/ui/cocoa/bookmarks/bookmark_tree_browser_cell.h',
       'browser/ui/cocoa/bookmarks/bookmark_tree_browser_cell.mm',
       'browser/ui/cocoa/browser/edit_search_engine_cocoa_controller.h',
       'browser/ui/cocoa/browser/edit_search_engine_cocoa_controller.mm',
       'browser/ui/cocoa/browser/zoom_bubble_controller.h',
       'browser/ui/cocoa/browser/zoom_bubble_controller.mm',
-      'browser/ui/cocoa/browser_command_executor.h',
       'browser/ui/cocoa/browser_window_cocoa.h',
       'browser/ui/cocoa/browser_window_cocoa.mm',
       'browser/ui/cocoa/browser_window_controller.h',
       'browser/ui/cocoa/browser_window_controller.mm',
       'browser/ui/cocoa/browser_window_controller_private.h',
       'browser/ui/cocoa/browser_window_controller_private.mm',
       'browser/ui/cocoa/browser_window_enter_fullscreen_transition.h',
       'browser/ui/cocoa/browser_window_enter_fullscreen_transition.mm',
       'browser/ui/cocoa/browser_window_factory_cocoa.mm',
       'browser/ui/cocoa/browser_window_layout.h',
@@ skipping 2317 matching lines @@
           ],
           'sources': [
             '<@(chrome_browser_ui_non_mobile_sources)',
             '<@(chrome_browser_ui_omnibox_non_mobile_sources)',
           ],
         }],
       ],
     },
   ],
 }