Split //ui/events/devices into two targets.

ui/events/devices/BUILD.gn

Index: ui/events/devices/BUILD.gn
diff --git a/ui/events/devices/BUILD.gn b/ui/events/devices/BUILD.gn
index f3dbfd5e5a1c796473a385bf222a45cfbddf9537..c4405459aedd9ba9941ff873cf2c80926198f42a 100644
--- a/ui/events/devices/BUILD.gn
+++ b/ui/events/devices/BUILD.gn
@@ -2,9 +2,6 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import("//build/config/ui.gni")
-import("//ui/ozone/ozone.gni")
-
 component("devices") {
   sources = [
     "device_data_manager.cc",
@@ -31,22 +28,4 @@ component("devices") {
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
-
-  if (use_x11 || ozone_platform_x11) {
-    configs += [ "//build/config/linux:x11" ]
-
-    sources += [
-      "x11/device_data_manager_x11.cc",
-      "x11/device_data_manager_x11.h",
-      "x11/device_list_cache_x11.cc",
-      "x11/device_list_cache_x11.h",
-      "x11/touch_factory_x11.cc",
-      "x11/touch_factory_x11.h",
-    ]
-
-    deps += [
-      "//ui/events:events_base",
-      "//ui/gfx/x",
-    ]
-  }
 }