Eliminate ash::internal namespace

ash/display/display_manager_unittest.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/display/display_manager.h"
 
 #include "ash/display/display_controller.h"
 #include "ash/display/display_layout_store.h"
 #include "ash/screen_util.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/test/display_manager_test_api.h"
 #include "ash/test/mirror_window_test_api.h"
 #include "base/format_macros.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "ui/aura/env.h"
 #include "ui/aura/test/event_generator.h"
 #include "ui/aura/window_observer.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/gfx/display_observer.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/screen.h"
 #include "ui/gfx/screen_type_delegate.h"
 
 namespace ash {
-namespace internal {
 
 using std::vector;
 using std::string;
 
 using base::StringPrintf;
 
 namespace {
 
 std::string ToDisplayName(int64 id) {
   return "x-" + base::Int64ToString(id);
@@ skipping 1185 matching lines @@
  private:
   DISALLOW_COPY_AND_ASSIGN(ScreenShutdownTest);
 };
 
 TEST_F(ScreenShutdownTest, ScreenAfterShutdown) {
   if (!SupportsMultipleDisplays())
     return;
   UpdateDisplay("500x300,800x400");
 }
 
-}  // namespace internal
 }  // namespace ash