Remove old downloads UI; Material Design version is now the default.

chrome/browser/resources/md_downloads/compiled_resources2.gyp

 # Copyright 2015 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.
 {
   'targets': [
     {
       'target_name': 'action_service',
       'dependencies': [
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:assert',
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:cr',
@@ skipping 28 matching lines @@
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:cr',
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:load_time_data',
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:util',
         '<(DEPTH)/ui/webui/resources/js/cr/compiled_resources2.gyp:ui',
         '<(DEPTH)/ui/webui/resources/js/cr/ui/compiled_resources2.gyp:command',
         '<(DEPTH)/third_party/polymer/v1_0/components-chromium/iron-list/compiled_resources2.gyp:iron-list-extracted',
         'action_service',
         'item',
         'toolbar',
         '<(EXTERNS_GYP):chrome_send',
-        '../downloads/compiled_resources2.gyp:externs',
+        'externs',
       ],
       'includes': ['../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
     {
       'target_name': 'toolbar',
       'dependencies': [
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:cr',
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:util',
         '<(DEPTH)/ui/webui/resources/cr_elements/cr_search_field/compiled_resources2.gyp:cr_search_field',
         'action_service',
       ],
       'includes': ['../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
   ],
 }