Eliminate ash::internal namespace

ash/shelf/background_animator.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/shelf/background_animator.h"
 
 
 namespace ash {
-namespace internal {
-
 namespace {
 
 // Duration of the background animation.
 const int kBackgroundDurationMS = 1000;
 
 }
 
 BackgroundAnimator::BackgroundAnimator(BackgroundAnimatorDelegate* delegate,
                                        int min_alpha,
                                        int max_alpha)
@@ skipping 30 matching lines @@
 }
 
 void BackgroundAnimator::AnimationProgressed(const gfx::Animation* animation) {
   int alpha = animation->CurrentValueBetween(min_alpha_, max_alpha_);
   if (alpha_ == alpha)
     return;
   alpha_ = alpha;
   delegate_->UpdateBackground(alpha_);
 }
 
-}  // namespace internal
 }  // namespace ash