Allow gaming_seat to use ozone gamepad as back-end

components/exo/BUILD.gn

Index: components/exo/BUILD.gn
diff --git a/components/exo/BUILD.gn b/components/exo/BUILD.gn
index 1b48931fed87d251ba48649098407a661378b7dc..857d90ed16aa16240c41fa5f8a1fa336ed688c0b 100644
--- a/components/exo/BUILD.gn
+++ b/components/exo/BUILD.gn
@@ -2,6 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//chrome/common/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 
@@ -13,7 +14,6 @@ source_set("exo") {
     "compositor_frame_sink_holder.h",
     "display.cc",
     "display.h",
-    "gaming_seat.cc",
     "gaming_seat.h",
     "keyboard.cc",
     "keyboard.h",
@@ -70,8 +70,13 @@ source_set("exo") {
     "//ui/wm",
   ]
 
-  if (use_ozone) {
+  if (enable_exo_ozone_gamepad) {
+    defines = [ "USE_OZONE_GAMEPAD" ]
+    sources += [ "gaming_seat_ozone.cc" ]
     deps += [ "//ui/ozone" ]
+    deps += [ "//ui/events/ozone:events_ozone_evdev" ]
+  } else {
+    sources += [ "gaming_seat.cc" ]
   }
 
   if (is_chromeos) {
@@ -111,7 +116,6 @@ source_set("unit_tests") {
   sources = [
     "buffer_unittest.cc",
     "display_unittest.cc",
-    "gaming_seat_unittest.cc",
     "keyboard_unittest.cc",
     "pointer_unittest.cc",
     "shared_memory_unittest.cc",
@@ -148,8 +152,11 @@ source_set("unit_tests") {
     "//ui/wm",
   ]
 
-  if (use_ozone) {
-    deps += [ "//ui/ozone" ]
+  if (enable_exo_ozone_gamepad) {
+    sources += [
+      "../../ui/events/ozone/gamepad/gamepad_event.cc",
+      "gaming_seat_unittest.cc",
+    ]
   }
 }