Don't use evdev except for target

ui/events/ozone/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/linux/pkg_config.gni")
 import("//build/config/ui.gni")
 
 declare_args() {
   # Optional system libraries.
   use_xkbcommon = false
+
+  # Support ChromeOS touchpad gestures with ozone.
+  use_evdev_gestures = false
 }
 
 if (use_xkbcommon) {
   pkg_config("xkbcommon") {
     packages = [ "xkbcommon" ]
   }
 }
 
 component("events_ozone") {
   sources = [
@@ skipping 20 matching lines @@
 
   defines = [ "EVENTS_OZONE_IMPLEMENTATION" ]
 
   if (!use_udev) {
     sources -= [
       "device/udev/device_manager_udev.cc",
       "device/udev/device_manager_udev.h",
     ]
   }
 
-  if (use_ozone_evdev && use_udev) {
+  if (use_ozone && use_udev) {
     deps += [ "//device/udev_linux" ]
   }
 }
 
 config("evdev") {
   defines = [ "USE_EVDEV" ]
 }
 
 config("evdev_gestures") {
   defines = [ "USE_EVDEV_GESTURES" ]
 }
 
+if (use_evdev_gestures) {
+  pkg_config("libevdev-cros") {
+    packages = [ "libevdev-cros" ]
+  }
+
+  pkg_config("libgestures") {
+    packages = [ "libgestures" ]
+  }
+}
+
 component("events_ozone_evdev") {
   sources = [
     "evdev/device_event_dispatcher_evdev.cc",
     "evdev/device_event_dispatcher_evdev.h",
     "evdev/event_converter_evdev.cc",
     "evdev/event_converter_evdev.h",
     "evdev/event_converter_evdev_impl.cc",
     "evdev/event_converter_evdev_impl.h",
     "evdev/event_device_info.cc",
     "evdev/event_device_info.h",
@@ skipping 48 matching lines @@
     "//ui/events",
     "//ui/events:dom_keycode_converter",
     "//ui/events:events_base",
     "//ui/events/devices",
     "//ui/events/platform",
     "//ui/gfx",
   ]
 
   public_configs = [ ":evdev" ]
 
-  if (use_ozone_evdev && use_evdev_gestures) {
+  if (use_ozone && use_evdev_gestures) {
     sources += [
       "evdev/libgestures_glue/event_reader_libevdev_cros.cc",
       "evdev/libgestures_glue/event_reader_libevdev_cros.h",
       "evdev/libgestures_glue/gesture_feedback.cc",
       "evdev/libgestures_glue/gesture_feedback.h",
       "evdev/libgestures_glue/gesture_interpreter_libevdev_cros.cc",
       "evdev/libgestures_glue/gesture_interpreter_libevdev_cros.h",
       "evdev/libgestures_glue/gesture_logging.cc",
       "evdev/libgestures_glue/gesture_logging.h",
       "evdev/libgestures_glue/gesture_property_provider.cc",
       "evdev/libgestures_glue/gesture_property_provider.h",
       "evdev/libgestures_glue/gesture_timer_provider.cc",
       "evdev/libgestures_glue/gesture_timer_provider.h",
     ]
 
     public_configs += [ ":evdev_gestures" ]
 
     configs += [
-      "//build/config/linux:libevdev-cros",
-      "//build/config/linux:libgestures",
+      ":libevdev-cros",
+      ":libgestures",
     ]
   }
 }
 
 config("events_ozone_layout_config") {
   if (use_xkbcommon) {
     defines = [ "USE_XKBCOMMON" ]
   }
 }
 
@@ skipping 29 matching lines @@
       "layout/xkb/xkb.h",
       "layout/xkb/xkb_evdev_codes.cc",
       "layout/xkb/xkb_evdev_codes.h",
       "layout/xkb/xkb_key_code_converter.h",
       "layout/xkb/xkb_keyboard_layout_engine.cc",
       "layout/xkb/xkb_keyboard_layout_engine.h",
       "layout/xkb/xkb_keysym.h",
     ]
   }
 }