ui: Remove TouchStatus in favour of EventResult.

ui/aura/event_filter.cc

 // Copyright (c) 2012 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/aura/event_filter.h"
 
 #include "ui/aura/window.h"
 #include "ui/base/events/event.h"
 
 namespace aura {
 
 bool EventFilter::PreHandleKeyEvent(Window* target, ui::KeyEvent* event) {
   return false;
 }
 
 bool EventFilter::PreHandleMouseEvent(Window* target, ui::MouseEvent* event) {
   return false;
 }
 
-ui::TouchStatus EventFilter::PreHandleTouchEvent(Window* target,
+ui::EventResult EventFilter::PreHandleTouchEvent(Window* target,
                                                  ui::TouchEvent* event) {
-  return ui::TOUCH_STATUS_UNKNOWN;
+  return ui::ER_UNHANDLED;
 }
 
 ui::EventResult EventFilter::PreHandleGestureEvent(Window* target,
                                                    ui::GestureEvent* event) {
   return ui::ER_UNHANDLED;
 }
 
 ui::EventResult EventFilter::OnKeyEvent(ui::KeyEvent* event) {
   return PreHandleKeyEvent(static_cast<Window*>(event->target()), event) ?
       ui::ER_CONSUMED : ui::ER_UNHANDLED;
 }
 
 ui::EventResult EventFilter::OnMouseEvent(ui::MouseEvent* event) {
   return PreHandleMouseEvent(static_cast<Window*>(event->target()), event) ?
       ui::ER_CONSUMED : ui::ER_UNHANDLED;
 }
 
 ui::EventResult EventFilter::OnScrollEvent(ui::ScrollEvent* event) {
   return ui::ER_UNHANDLED;
 }
 
 ui::EventResult EventFilter::OnTouchEvent(ui::TouchEvent* event) {
-  ui::TouchStatus status = PreHandleTouchEvent(
-      static_cast<Window*>(event->target()), event);
-  return ui::EventResultFromTouchStatus(status);
+  return PreHandleTouchEvent(static_cast<Window*>(event->target()), event);
 }
 
 ui::EventResult EventFilter::OnGestureEvent(ui::GestureEvent* event) {
   return PreHandleGestureEvent(static_cast<Window*>(event->target()), event);
 }
 
 }  // namespace aura