Eliminate ash::internal namespace

ash/wm/gestures/shelf_gesture_handler.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/gestures/shelf_gesture_handler.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/session_state_delegate.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_types.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell.h"
 #include "ash/system/status_area_widget.h"
 #include "ash/wm/gestures/tray_gesture_handler.h"
 #include "ash/wm/window_state.h"
 #include "ash/wm/window_util.h"
 #include "ui/aura/window.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/scoped_layer_animation_settings.h"
 #include "ui/gfx/transform.h"
 #include "ui/views/widget/widget.h"
 
 namespace ash {
-namespace internal {
 
 ShelfGestureHandler::ShelfGestureHandler()
     : drag_in_progress_(false) {
 }
 
 ShelfGestureHandler::~ShelfGestureHandler() {
 }
 
 bool ShelfGestureHandler::ProcessGestureEvent(const ui::GestureEvent& event) {
   Shell* shell = Shell::GetInstance();
@@ skipping 51 matching lines @@
 
     shelf->CompleteGestureDrag(event);
     return true;
   }
 
   // Unexpected event. Reset the state and let the event fall through.
   shelf->CancelGestureDrag();
   return false;
 }
 
-}  // namespace internal
 }  // namespace ash