Add tests for InputDevice/TouchscreenDevice StructTraits.

ui/events/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/ui.gni")
 import("//testing/test.gni")
 import("//ui/ozone/ozone.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
@@ skipping 367 matching lines @@
     "//ui/events/devices",
     "//ui/events/platform",
     "//ui/gfx:test_support",
   ]
 
   if (!is_ios) {
     sources += [
       "blink/blink_event_util_unittest.cc",
       "blink/input_handler_proxy_unittest.cc",
       "blink/input_scroll_elasticity_controller_unittest.cc",
+      "devices/mojo/device_struct_traits_unittest.cc",
       "gestures/blink/web_gesture_curve_impl_unittest.cc",
       "ipc/latency_info_param_traits_unittest.cc",
       "mojo/struct_traits_unittest.cc",
     ]
     deps += [
       "//cc",
       "//ipc:test_support",
       "//mojo/public/cpp/bindings",
       "//third_party/WebKit/public:blink_headers",
       "//ui/events/blink",
+      "//ui/events/devices/mojo:test_interfaces",
       "//ui/events/gestures/blink",
       "//ui/events/ipc",
       "//ui/events/mojo:test_interfaces",
       "//ui/gfx/ipc/geometry",
     ]
   }
 
   data_deps = [
     "//third_party/mesa:osmesa",
   ]
@@ skipping 60 matching lines @@
   generate_jar_jni("motionevent_jni_headers") {
     jni_package = "ui"
     classes = [ "android/view/MotionEvent.class" ]
   }
 
   generate_jar_jni("keyevent_jni_headers") {
     jni_package = "ui"
     classes = [ "android/view/KeyEvent.class" ]
   }
 }