Use a single views::MenuConfig instance for each platform

ui/views/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/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 
 gypi_values = exec_script("//build/gypi_to_gn.py",
                           [ rebase_path("views.gyp") ],
@@ skipping 54 matching lines @@
     sources -= [
       "linux_ui/linux_ui.cc",
       "linux_ui/linux_ui.h",
       "linux_ui/window_button_order_observer.h",
       "linux_ui/window_button_order_provider.cc",
     ]
   }
 
   if (is_chromeos) {
     sources -= [
+      "controls/menu/menu_config_linux.cc",
       "linux_ui/status_icon_linux.cc",
       "linux_ui/status_icon_linux.h",
     ]
   }
 
   if (is_win) {
     sources += gypi_values.views_win_sources
     libs = [
       "dwmapi.lib",
       "imm32.lib",
@@ skipping 216 matching lines @@
       "//ui/base:test_support",
       "//ui/compositor",
       "//ui/events:test_support",
       "//ui/gl:test_support",
       "//ui/resources",
       "//ui/resources:ui_test_pak",
       "//ui/strings",
     ]
   }
 }