Change ui::Event::time_stamp from TimeDelta to TimeTicks

ui/events/mojo/event_struct_traits.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 "ui/events/mojo/event_struct_traits.h"
 
 #include "components/mus/public/interfaces/input_event_constants.mojom.h"
 #include "ui/events/event.h"
 #include "ui/events/event_utils.h"
 #include "ui/events/keycodes/dom/keycode_converter.h"
@@ skipping 297 matching lines @@
           return false;
       }
     }
     case mus::mojom::EventType::UNKNOWN:
       return false;
   }
 
   return false;
 }
 
-}  // namespace mojo
+}  // namespace mojo