Makes KeyEvent struct traits restore Event::time_stamp() field

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 118 matching lines @@
       {ET_KEY_PRESSED, VKEY_RETURN, EF_CONTROL_DOWN},
       {ET_KEY_PRESSED, VKEY_MENU, EF_ALT_DOWN},
       {ET_KEY_RELEASED, VKEY_SHIFT, EF_SHIFT_DOWN},
       {ET_KEY_RELEASED, VKEY_MENU, EF_ALT_DOWN},
       {ET_KEY_PRESSED, VKEY_A, ui::DomCode::US_A, EF_NONE},
       {ET_KEY_PRESSED, VKEY_B, ui::DomCode::US_B,
        EF_CONTROL_DOWN | EF_ALT_DOWN},
       {'\x12', VKEY_2, EF_CONTROL_DOWN},
       {'Z', VKEY_Z, EF_CAPS_LOCK_ON},
       {'z', VKEY_Z, EF_NONE},
+      {ET_KEY_PRESSED, VKEY_Z, EF_NONE,
+       base::TimeTicks::FromInternalValue(101)},
+      {'Z', VKEY_Z, EF_NONE, base::TimeTicks::FromInternalValue(102)},
   };
 
   mojom::TraitsTestServicePtr proxy = GetTraitsTestProxy();
   for (size_t i = 0; i < arraysize(kTestData); i++) {
     std::unique_ptr<Event> output;
     proxy->EchoEvent(Event::Clone(kTestData[i]), &output);
     EXPECT_TRUE(output->IsKeyEvent());
 
     const KeyEvent* output_key_event = output->AsKeyEvent();
     EXPECT_EQ(kTestData[i].type(), output_key_event->type());
     EXPECT_EQ(kTestData[i].flags(), output_key_event->flags());
     EXPECT_EQ(kTestData[i].GetCharacter(), output_key_event->GetCharacter());
     EXPECT_EQ(kTestData[i].GetUnmodifiedText(),
               output_key_event->GetUnmodifiedText());
     EXPECT_EQ(kTestData[i].GetText(), output_key_event->GetText());
     EXPECT_EQ(kTestData[i].is_char(), output_key_event->is_char());
     EXPECT_EQ(kTestData[i].is_repeat(), output_key_event->is_repeat());
     EXPECT_EQ(kTestData[i].GetConflatedWindowsKeyCode(),
               output_key_event->GetConflatedWindowsKeyCode());
     EXPECT_EQ(kTestData[i].code(), output_key_event->code());
+    EXPECT_EQ(kTestData[i].time_stamp(), output_key_event->time_stamp());
   }
 }
 
 TEST_F(StructTraitsTest, PointerEvent) {
   PointerEvent kTestData[] = {
       // Mouse pointer events:
       {ET_POINTER_DOWN, gfx::Point(10, 10), gfx::Point(20, 30), EF_NONE,
        PointerEvent::kMousePointerId, 0,
        PointerDetails(EventPointerType::POINTER_TYPE_MOUSE), base::TimeTicks()},
       {ET_POINTER_MOVED, gfx::Point(1, 5), gfx::Point(5, 1),
@@ skipping 61 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