Remove TouchEvent interface, and rename TouchEventImpl to TouchEvent

ash/touch/touch_observer_hud.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 "ash/touch/touch_observer_hud.h"
 
 #include "ash/shell_window_ids.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
 #include "third_party/skia/include/core/SkPath.h"
@@ skipping 176 matching lines @@
   return false;
 }
 
 bool TouchObserverHUD::PreHandleMouseEvent(aura::Window* target,
                                            ui::MouseEvent* event) {
   return false;
 }
 
 ui::TouchStatus TouchObserverHUD::PreHandleTouchEvent(
     aura::Window* target,
-    ui::TouchEventImpl* event) {
+    ui::TouchEvent* event) {
   if (event->touch_id() >= kMaxTouchPoints)
     return ui::TOUCH_STATUS_UNKNOWN;
 
   if (event->type() != ui::ET_TOUCH_CANCELLED)
     touch_positions_[event->touch_id()] = event->root_location();
   if (event->type() == ui::ET_TOUCH_PRESSED)
     canvas_->Start(event->touch_id(), touch_positions_[event->touch_id()]);
   else
     canvas_->Update(event->touch_id(), touch_positions_[event->touch_id()]);
   touch_status_[event->touch_id()] = event->type();
@@ skipping 11 matching lines @@
   return ui::GESTURE_STATUS_UNKNOWN;
 }
 
 void TouchObserverHUD::OnWidgetClosing(views::Widget* widget) {
   DCHECK_EQ(widget, widget_);
   widget_ = NULL;
 }
 
 }  // namespace internal
 }  // namespace ash