Get rid of some lingering MD-specific raster assets.

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 2426 matching lines @@
       'browser/ui/views/theme_copying_widget.h',
       'browser/ui/views/toolbar/app_menu.cc',
       'browser/ui/views/toolbar/app_menu.h',
       'browser/ui/views/toolbar/app_menu_button.cc',
       'browser/ui/views/toolbar/app_menu_button.h',
       'browser/ui/views/toolbar/app_menu_observer.h',
       'browser/ui/views/toolbar/back_button.cc',
       'browser/ui/views/toolbar/back_button.h',
       'browser/ui/views/toolbar/browser_actions_container.cc',
       'browser/ui/views/toolbar/browser_actions_container.h',
-      'browser/ui/views/toolbar/chevron_menu_button.cc',
-      'browser/ui/views/toolbar/chevron_menu_button.h',
       'browser/ui/views/toolbar/extension_toolbar_menu_view.cc',
       'browser/ui/views/toolbar/extension_toolbar_menu_view.h',
       'browser/ui/views/toolbar/home_button.cc',
       'browser/ui/views/toolbar/home_button.h',
       'browser/ui/views/toolbar/reload_button.cc',
       'browser/ui/views/toolbar/reload_button.h',
       'browser/ui/views/toolbar/toolbar_action_view.cc',
       'browser/ui/views/toolbar/toolbar_action_view.h',
       'browser/ui/views/toolbar/toolbar_action_view_delegate_views.h',
       'browser/ui/views/toolbar/toolbar_actions_bar_bubble_views.cc',
@@ skipping 838 matching lines @@
           ],
           'sources': [
             '<@(chrome_browser_ui_non_mobile_sources)',
             '<@(chrome_browser_ui_omnibox_non_mobile_sources)',
           ],
         }],
       ],
     },
   ],
 }