Delete old (pre-MD) download shelf view code.

chrome/browser/ui/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
 import("//media/media_options.gni")
@@ skipping 1579 matching lines @@
         "views/constrained_web_dialog_delegate_views.cc",
         "views/create_application_shortcut_view.cc",
         "views/create_application_shortcut_view.h",
         "views/download/download_danger_prompt_views.cc",
         "views/download/download_feedback_dialog_view.cc",
         "views/download/download_feedback_dialog_view.h",
         "views/download/download_in_progress_dialog_view.cc",
         "views/download/download_in_progress_dialog_view.h",
         "views/download/download_item_view.cc",
         "views/download/download_item_view.h",
-        "views/download/download_item_view_md.cc",
-        "views/download/download_item_view_md.h",
         "views/download/download_shelf_context_menu_view.cc",
         "views/download/download_shelf_context_menu_view.h",
         "views/download/download_shelf_view.cc",
         "views/download/download_shelf_view.h",
         "views/download/download_started_animation_views.cc",
         "views/dropdown_bar_host.cc",
         "views/dropdown_bar_host.h",
         "views/dropdown_bar_host_delegate.h",
         "views/dropdown_bar_view.cc",
         "views/dropdown_bar_view.h",
@@ skipping 1758 matching lines @@
       "passwords/passwords_model_delegate_mock.cc",
       "passwords/passwords_model_delegate_mock.h",
     ]
     deps += [ "//chrome/test:test_support_ui" ]
   }
 
   if (enable_extensions) {
     deps += [ "//extensions/browser" ]
   }
 }