Add tests for InputDevice/TouchscreenDevice StructTraits.

ui/events/devices/mojo/device_struct_traits_test.mojom

Index: ui/events/devices/mojo/device_struct_traits_test.mojom
diff --git a/skia/public/interfaces/test/traits_test_service.mojom b/ui/events/devices/mojo/device_struct_traits_test.mojom
similarity index 55%
copy from skia/public/interfaces/test/traits_test_service.mojom
copy to ui/events/devices/mojo/device_struct_traits_test.mojom
index eaa829e8163329b4d5759510b75d83dfb25e2dfe..9f88a89780796f0ee7ba0eb630a5a11084acfadc 100644
--- a/skia/public/interfaces/test/traits_test_service.mojom
+++ b/ui/events/devices/mojo/device_struct_traits_test.mojom
@@ -2,17 +2,16 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-module skia.mojom;
+module ui.mojom;
 
-import "skia/public/interfaces/bitmap.mojom";
-import "skia/public/interfaces/image_filter.mojom";
+import "ui/events/devices/mojo/input_devices.mojom";
 
 // All functions on this interface echo their arguments to test StructTraits
 // serialization and deserialization.
-interface TraitsTestService {
+interface DeviceStructTraitsTest {
   [Sync]
-  EchoBitmap(Bitmap b) => (Bitmap pass);
+  EchoInputDevice(InputDevice in) => (InputDevice out);
 
   [Sync]
-  EchoImageFilter(ImageFilter i) => (ImageFilter pass);
+  EchoTouchscreenDevice(TouchscreenDevice in) => (TouchscreenDevice out);
 };