Eliminate ash::internal namespace

ash/wm/dock/dock_types.h

 // Copyright (c) 2013 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.
 
 #ifndef ASH_WM_DOCK_DOCK_TYPES_H_
 #define ASH_WM_DOCK_DOCK_TYPES_H_
 
 namespace ash {
 
-namespace internal {
-
 // Possible values of which side of the screen the windows are docked at.
 // This is used by DockedwindowLayoutManager and DockedWindowResizer to
 // implement docking behavior including magnetism while dragging windows into
 // or out of the docked windows area.
 enum DockedAlignment {
   // No docked windows.
   DOCKED_ALIGNMENT_NONE,
 
   // Some windows are already docked on the left side of the screen.
   DOCKED_ALIGNMENT_LEFT,
@@ skipping 20 matching lines @@
 // Event source for the docking user action (when known).
 enum DockedActionSource {
   DOCKED_ACTION_SOURCE_UNKNOWN,
   DOCKED_ACTION_SOURCE_MOUSE,
   DOCKED_ACTION_SOURCE_TOUCH,
 
   // Maximum value of this enum for histograms use.
   DOCKED_ACTION_SOURCE_COUNT,
 };
 
-}  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_WM_DOCK_DOCK_TYPES_H_