Re-adding and fixing StructTraitsTest for events and latency.

StructTraitsTest for events and latency were removed from the build by
accident in https://codereview.chromium.org/2783973002.

BUG=686865

Review-Url: https://codereview.chromium.org/2802923002
Cr-Commit-Position: refs/heads/master@{#462902}

ui/events/BUILD.gn

@@ -407,6 +407,7 @@ if (!is_ios) {
         "blink/web_input_event_unittest.cc",
         "devices/mojo/device_struct_traits_unittest.cc",
         "gestures/blink/web_gesture_curve_impl_unittest.cc",
+        "mojo/struct_traits_unittest.cc",
       ]
       deps += [
         "//cc",

ui/events/mojo/struct_traits_unittest.cc

@@ -9,6 +9,8 @@
 #include "ui/events/keycodes/dom/dom_code.h"
 #include "ui/events/mojo/event.mojom.h"
 #include "ui/events/mojo/event_struct_traits.h"
+#include "ui/events/mojo/traits_test_service.mojom.h"
+#include "ui/latency/mojo/latency_info_struct_traits.h"
 
 namespace ui {
 

ui/latency/BUILD.gn

@@ -24,8 +24,8 @@ test("latency_unittests") {
   deps = [
     ":latency",
     "//base",
-    "//base/test:run_all_unittests",
     "//base/test:test_support",
+    "//mojo/edk/test:run_all_unittests",
     "//testing/gmock",
     "//testing/gtest",
   ]
@@ -33,11 +33,13 @@ test("latency_unittests") {
   if (!is_ios) {
     sources += [
       "ipc/latency_info_param_traits_unittest.cc",
-      "mojo/struct_traits_unittest",
+      "mojo/struct_traits_unittest.cc",
     ]
     deps += [
       "//ipc:test_support",
+      "//mojo/public/cpp/bindings",
       "//ui/latency/ipc",
+      "//ui/latency/mojo:test_interfaces",
     ]
   }
 }

ui/latency/mojo/struct_traits_unittest.cc

@@ -5,8 +5,8 @@
 #include "base/message_loop/message_loop.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
 #include "testing/gtest/include/gtest/gtest.h"
-#include "ui/events/mojo/latency_info_struct_traits.h"
-#include "ui/events/mojo/traits_test_service.mojom.h"
+#include "ui/latency/mojo/latency_info_struct_traits.h"
+#include "ui/latency/mojo/traits_test_service.mojom.h"
 
 namespace ui {