Cleanup ui/views aura build configuration.

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")
 
 config("flags") {
   defines = [ "TOOLKIT_VIEWS=1" ]
@@ skipping 535 matching lines @@
         "widget/desktop_aura/desktop_focus_rules.h",
         "widget/desktop_aura/desktop_native_cursor_manager.cc",
         "widget/desktop_aura/desktop_native_cursor_manager.h",
         "widget/desktop_aura/desktop_native_widget_aura.cc",
         "widget/desktop_aura/desktop_native_widget_aura.h",
         "widget/desktop_aura/desktop_screen.h",
         "widget/desktop_aura/desktop_screen_position_client.cc",
         "widget/desktop_aura/desktop_screen_position_client.h",
         "widget/desktop_aura/desktop_window_tree_host.h",
       ]
-      if (use_atk) {
+      if (use_x11) {
         sources += [
-          "accessibility/native_view_accessibility_auralinux.cc",
-          "accessibility/native_view_accessibility_auralinux.h",
           "widget/desktop_aura/desktop_drag_drop_client_aurax11.cc",
           "widget/desktop_aura/desktop_drag_drop_client_aurax11.h",
           "widget/desktop_aura/desktop_screen_x11.cc",
           "widget/desktop_aura/desktop_screen_x11.h",
           "widget/desktop_aura/desktop_window_tree_host_x11.cc",
           "widget/desktop_aura/desktop_window_tree_host_x11.h",
           "widget/desktop_aura/x11_desktop_handler.cc",
           "widget/desktop_aura/x11_desktop_handler.h",
           "widget/desktop_aura/x11_desktop_handler_observer.h",
           "widget/desktop_aura/x11_desktop_window_move_client.cc",
           "widget/desktop_aura/x11_desktop_window_move_client.h",
           "widget/desktop_aura/x11_move_loop.h",
           "widget/desktop_aura/x11_move_loop_delegate.h",
           "widget/desktop_aura/x11_pointer_grab.cc",
           "widget/desktop_aura/x11_pointer_grab.h",
           "widget/desktop_aura/x11_topmost_window_finder.cc",
           "widget/desktop_aura/x11_topmost_window_finder.h",
           "widget/desktop_aura/x11_whole_screen_move_loop.cc",
           "widget/desktop_aura/x11_whole_screen_move_loop.h",
           "widget/desktop_aura/x11_window_event_filter.cc",
           "widget/desktop_aura/x11_window_event_filter.h",
         ]
-        configs += [ "//build/config/linux/atk" ]
+        if (use_atk) {
+          sources += [
+            "accessibility/native_view_accessibility_auralinux.cc",
+            "accessibility/native_view_accessibility_auralinux.h",
+          ]
+          configs += [ "//build/config/linux/atk" ]
+        }
       } else if (is_win) {
         sources += [
           "widget/desktop_aura/desktop_cursor_loader_updater_aurawin.cc",
           "widget/desktop_aura/desktop_drag_drop_client_win.cc",
           "widget/desktop_aura/desktop_drag_drop_client_win.h",
           "widget/desktop_aura/desktop_screen_win.cc",
           "widget/desktop_aura/desktop_screen_win.h",
           "widget/desktop_aura/desktop_window_tree_host_win.cc",
           "widget/desktop_aura/desktop_window_tree_host_win.h",
         ]
@@ skipping 398 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",
     ]
   }
 }