Moving LatencyInfo into a separate component.

ui/events/mojo/traits_test_service.mojom

 // 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.
 
 module ui.mojom;
 
 import "ui/events/mojo/event.mojom";
-import "ui/events/mojo/latency_info.mojom";
 
 interface TraitsTestService {
   [Sync]
   EchoEvent(Event e) => (Event pass);
-
-  [Sync]
-  EchoLatencyComponent(LatencyComponent l) => (LatencyComponent pass);
-
-  [Sync]
-  EchoLatencyComponentId(LatencyComponentId l) => (LatencyComponentId pass);
-
-  [Sync]
-  EchoLatencyInfo(LatencyInfo l) => (LatencyInfo pass);
 };