Eliminate ash::internal namespace

ash/wm/maximize_mode/workspace_backdrop_delegate.cc

 // Copyright 2014 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/maximize_mode/workspace_backdrop_delegate.h"
 
 #include "ash/wm/window_animations.h"
 #include "ash/wm/window_util.h"
 #include "base/auto_reset.h"
 #include "ui/aura/window.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/scoped_layer_animation_settings.h"
 #include "ui/views/background.h"
 #include "ui/views/widget/widget.h"
 #include "ui/wm/core/window_animations.h"
 #include "ui/wm/core/window_util.h"
 
 namespace ash {
-
-namespace internal {
-
 namespace {
 
 // The opacity of the backdrop.
 const float kBackdropOpacity = 0.5f;
 
 }  // namespace
 
 WorkspaceBackdropDelegate::WorkspaceBackdropDelegate(aura::Window* container)
     : background_(NULL),
       container_(container),
@@ skipping 110 matching lines @@
 }
 
 void WorkspaceBackdropDelegate::Show() {
   background_->GetNativeView()->layer()->SetOpacity(0.0f);
   background_->Show();
   ui::ScopedLayerAnimationSettings settings(
       background_->GetNativeView()->layer()->GetAnimator());
   background_->GetNativeView()->layer()->SetOpacity(kBackdropOpacity);
 }
 
-}  // namespace internal
 }  // namespace ash