Eliminate ash::internal namespace

ash/system/tray/fixed_sized_scroll_view.cc

 // Copyright 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.
 
 #include "ash/system/tray/fixed_sized_scroll_view.h"
 
 namespace ash {
-namespace internal {
 
 FixedSizedScrollView::FixedSizedScrollView() {
   set_notify_enter_exit_on_child(true);
 }
 
 FixedSizedScrollView::~FixedSizedScrollView() {
 }
 
 void FixedSizedScrollView::SetContentsView(views::View* view) {
   SetContents(view);
@@ skipping 27 matching lines @@
     contents()->SetBoundsRect(bounds);
   }
 }
 
 void FixedSizedScrollView::OnBoundsChanged(const gfx::Rect& previous_bounds) {
   gfx::Rect bounds = gfx::Rect(contents()->GetPreferredSize());
   bounds.set_width(std::max(0, width() - GetScrollBarWidth()));
   contents()->SetBoundsRect(bounds);
 }
 
-}  // namespace internal
 }  // namespace ash