Eliminate ash::internal namespace

ash/desktop_background/desktop_background_view.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/desktop_background/desktop_background_view.h"
 
 #include <limits>
 
 #include "ash/ash_export.h"
 #include "ash/desktop_background/desktop_background_controller.h"
@@ skipping 10 matching lines @@
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/compositor/layer.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/size_conversions.h"
 #include "ui/gfx/transform.h"
 #include "ui/views/widget/widget.h"
 
 namespace ash {
-namespace internal {
 namespace {
 
 // For our scaling ratios we need to round positive numbers.
 int RoundPositive(double x) {
   return static_cast<int>(floor(x + 0.5));
 }
 
 // A view that controls the child view's layer so that the layer
 // always has the same size as the display's original, un-scaled size
 // in DIP. The layer then transformed to fit to the virtual screen
@@ skipping 175 matching lines @@
   } else {
     // Disable animation if transition to login screen from an empty background.
     wm::SetWindowVisibilityAnimationTransition(
         desktop_widget->GetNativeView(), wm::ANIMATE_NONE);
   }
 
   desktop_widget->SetBounds(params.parent->bounds());
   return desktop_widget;
 }
 
-}  // namespace internal
 }  // namespace ash