Remove GestureEvent interface, and rename GestureEventImpl to GestureEvent.

ash/wm/overlay_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 "ash/wm/overlay_event_filter.h"
 
 #include "ash/wm/partial_screenshot_view.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_delegate.h"
 #include "ui/base/event.h"
@@ skipping 46 matching lines @@
   }
   return false;  // Not handled.
 }
 
 ui::TouchStatus OverlayEventFilter::PreHandleTouchEvent(
     aura::Window* target, ui::TouchEvent* event) {
   return ui::TOUCH_STATUS_UNKNOWN;  // Not handled.
 }
 
 ui::GestureStatus OverlayEventFilter::PreHandleGestureEvent(
-    aura::Window* target, ui::GestureEventImpl* event) {
+    aura::Window* target, ui::GestureEvent* event) {
   return ui::GESTURE_STATUS_UNKNOWN;  // Not handled.
 }
 
 void OverlayEventFilter::OnLoginStateChanged(
     user::LoginStatus status) {
   Cancel();
 }
 
 void OverlayEventFilter::OnAppTerminating() {
   Cancel();
@@ skipping 10 matching lines @@
 void OverlayEventFilter::Deactivate() {
   delegate_ = NULL;
 }
 
 void OverlayEventFilter::Cancel() {
   if (delegate_)
     delegate_->Cancel();
 }
 }  // namespace internal
 }  // namespace ash