Re-adding and fixing StructTraitsTest for events and latency.

ui/events/mojo/struct_traits_unittest.cc

 // Copyright 2016 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.
 
 #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/event.h"
 #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 {
 
 namespace {
 
 class StructTraitsTest : public testing::Test, public mojom::TraitsTestService {
  public:
   StructTraitsTest() {}
 
  protected:
@@ skipping 157 matching lines @@
   std::unique_ptr<Event> event_ptr = Event::Clone(key_event);
   std::unique_ptr<Event> deserialized;
   ASSERT_TRUE(mojom::Event::Deserialize(mojom::Event::Serialize(&event_ptr),
                                         &deserialized));
   ASSERT_TRUE(deserialized->IsKeyEvent());
   ASSERT_TRUE(deserialized->AsKeyEvent()->properties());
   EXPECT_EQ(properties, *(deserialized->AsKeyEvent()->properties()));
 }
 
 }  // namespace ui