Add id properties to PointerEvent

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/keycodes/dom/dom_code.h"
 #include "ui/events/mojo/traits_test_service.mojom.h"
 
@@ skipping 181 matching lines @@
   for (size_t i = 0; i < arraysize(kTestData); i++) {
     std::unique_ptr<Event> output;
     proxy->EchoEvent(Event::Clone(kTestData[i]), &output);
     EXPECT_TRUE(output->IsPointerEvent());
 
     const PointerEvent* output_ptr_event = output->AsPointerEvent();
     EXPECT_EQ(kTestData[i].type(), output_ptr_event->type());
     EXPECT_EQ(kTestData[i].flags(), output_ptr_event->flags());
     EXPECT_EQ(kTestData[i].location(), output_ptr_event->location());
     EXPECT_EQ(kTestData[i].root_location(), output_ptr_event->root_location());
-    EXPECT_EQ(kTestData[i].pointer_id(), output_ptr_event->pointer_id());
+    EXPECT_EQ(kTestData[i].pointer_details().id,
+              output_ptr_event->pointer_details().id);
     EXPECT_EQ(kTestData[i].changed_button_flags(),
               output_ptr_event->changed_button_flags());
     EXPECT_EQ(kTestData[i].pointer_details(),
               output_ptr_event->pointer_details());
   }
 }
 
 TEST_F(StructTraitsTest, PointerWheelEvent) {
   MouseWheelEvent kTestData[] = {
       {gfx::Vector2d(11, 15), gfx::Point(3, 4), gfx::Point(40, 30),
@@ skipping 16 matching lines @@
     EXPECT_EQ(kTestData[i].flags(), output_pointer_event->flags());
     EXPECT_EQ(kTestData[i].location(), output_pointer_event->location());
     EXPECT_EQ(kTestData[i].root_location(),
               output_pointer_event->root_location());
     EXPECT_EQ(kTestData[i].offset(),
               output_pointer_event->pointer_details().offset);
   }
 }
 
 }  // namespace ui