Add a mojom/StructTrait for display::Display.

services/ui/public/interfaces/display/BUILD.gn

Index: services/ui/public/interfaces/display/BUILD.gn
diff --git a/ui/events/devices/mojo/BUILD.gn b/services/ui/public/interfaces/display/BUILD.gn
similarity index 78%
copy from ui/events/devices/mojo/BUILD.gn
copy to services/ui/public/interfaces/display/BUILD.gn
index fe65d7d19735568070fee21df3eff6c210f46cfc..265dba3e495f734de1d0f205baf175349178057b 100644
--- a/ui/events/devices/mojo/BUILD.gn
+++ b/services/ui/public/interfaces/display/BUILD.gn
@@ -4,9 +4,9 @@
 
 import("//mojo/public/tools/bindings/mojom.gni")
 
-mojom("mojo") {
+mojom("display") {
   sources = [
-    "input_devices.mojom",
+    "display.mojom",
   ]
 
   public_deps = [
@@ -16,10 +16,10 @@ mojom("mojo") {
 
 mojom("test_interfaces") {
   sources = [
-    "device_struct_traits_test.mojom",
+    "display_struct_traits_test.mojom",
   ]
 
   public_deps = [
-    ":mojo",
+    ":display",
   ]
 }