Eliminate ash::internal namespace

ash/display/display_change_observer_chromeos_unittest.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/display/display_change_observer_chromeos.h"
 
 #include "ash/display/display_info.h"
 #include "base/memory/scoped_vector.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/display/chromeos/display_mode.h"
 #include "ui/display/chromeos/output_configurator.h"
 #include "ui/display/chromeos/test/test_display_snapshot.h"
 
 using ui::OutputConfigurator;
 
 typedef testing::Test DisplayChangeObserverTest;
 
 namespace ash {
-namespace internal {
 
 TEST_F(DisplayChangeObserverTest, GetDisplayModeList) {
   ScopedVector<const ui::DisplayMode> modes;
   modes.push_back(new ui::DisplayMode(gfx::Size(1920, 1200), false, 60));
 
   // All non-interlaced (as would be seen with different refresh rates).
   modes.push_back(new ui::DisplayMode(gfx::Size(1920, 1080), false, 80));
   modes.push_back(new ui::DisplayMode(gfx::Size(1920, 1080), false, 70));
   modes.push_back(new ui::DisplayMode(gfx::Size(1920, 1080), false, 60));
 
@@ skipping 46 matching lines @@
   EXPECT_EQ(display_modes[5].refresh_rate, 60);
 
   // Outputs without any modes shouldn't cause a crash.
   modes.clear();
   display_snapshot.set_modes(modes.get());
 
   display_modes = DisplayChangeObserver::GetDisplayModeList(output);
   EXPECT_EQ(0u, display_modes.size());
 }
 
-}  // namespace internal
 }  // namespace ash