Remove TouchEvent interface, and rename TouchEventImpl to TouchEvent

ash/touch/touch_uma.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_uma.h"
 
 #include "ash/shell_delegate.h"
 #include "base/metrics/histogram.h"
 #include "base/stringprintf.h"
 #include "ui/aura/root_window.h"
@@ skipping 238 matching lines @@
 
   if (event.type() == ui::ET_GESTURE_END &&
       event.details().touch_points() == 2) {
     WindowTouchDetails* details = target->GetProperty(kWindowTouchDetails);
     CHECK(details) << "Window received gesture but no touch events?";
     details->last_mt_time_ = event.time_stamp();
   }
 }
 
 void TouchUMA::RecordTouchEvent(aura::Window* target,
-                                const ui::TouchEventImpl& event) {
+                                const ui::TouchEvent& event) {
   UMA_HISTOGRAM_CUSTOM_COUNTS("Ash.TouchRadius",
       static_cast<int>(std::max(event.radius_x(), event.radius_y())),
       1, 500, 100);
 
   WindowTouchDetails* details = target->GetProperty(kWindowTouchDetails);
   if (!details) {
     details = new WindowTouchDetails;
     target->SetProperty(kWindowTouchDetails, details);
   }
 
@@ skipping 43 matching lines @@
 
     UMA_HISTOGRAM_CUSTOM_COUNTS("Ash.TouchMoveSteps", distance, 1, 1000, 50);
 
     details->last_move_time_[event.touch_id()] = event.time_stamp();
     details->last_touch_position_[event.touch_id()] = event.location();
   }
 }
 
 }  // namespace internal
 }  // namespace ash