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..b30beec8937f2c9815409c98d0897bab528b1d0e 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 (use_ozone && enable_ozone_gamepad_in_exo) {

[reveman, 2017/06/05 22:48:03]

hm, is use_ozone needed? isn't that automatic from _ozone file name prefix?
anyhow, probably shouldn't be setting enable_ozone_gamepad_in_exo to true unless
when building for ozone

[jkwang, 2017/06/06 20:03:06]

Done.

+    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 +152,13 @@ source_set("unit_tests") {
     "//ui/wm",
   ]
 
-  if (use_ozone) {
-    deps += [ "//ui/ozone" ]
+  if (use_ozone && enable_ozone_gamepad_in_exo) {
+    sources += [
+      "../../ui/events/ozone/gamepad/gamepad_event.cc",

[reveman, 2017/06/05 22:48:03]

I think you can include this unconditionally when use_ozone is true

[jkwang, 2017/06/06 20:03:06]

Won't compile. The test case is specific for one impl.

+      "gaming_seat_ozone_unittest.cc",
+    ]
+  } else {
+    sources += [ "gaming_seat_unittest.cc" ]
   }
 }