Eliminate ash::internal namespace

ash/test/display_manager_test_api.h

 // 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.
 
 #ifndef ASH_TEST_DISPLAY_MANAGER_TEST_API_H_
 #define ASH_TEST_DISPLAY_MANAGER_TEST_API_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "ui/display/display_constants.h"
 
 namespace ash {
-namespace internal {
 class DisplayManager;
-}  // internal
 
 namespace test {
 
 class DisplayManagerTestApi {
  public:
-  explicit DisplayManagerTestApi(internal::DisplayManager* display_manager);
+  explicit DisplayManagerTestApi(DisplayManager* display_manager);
   virtual ~DisplayManagerTestApi();
 
   // Update the display configuration as given in |display_specs|. The format of
   // |display_spec| is a list of comma separated spec for each displays. Please
   // refer to the comment in |aura::DisplayManager::CreateDisplayFromSpec| for
   // the format of the display spec.
   void UpdateDisplay(const std::string& display_specs);
 
   // Set the 1st display as an internal display and returns the display Id for
   // the internal display.
   int64 SetFirstDisplayAsInternalDisplay();
 
   // Don't update the display when the root window's size was changed.
   void DisableChangeDisplayUponHostResize();
 
   // Sets the available color profiles for |display_id|.
   void SetAvailableColorProfiles(
       int64 display_id,
       const std::vector<ui::ColorCalibrationProfile>& profiles);
 
  private:
-  internal::DisplayManager* display_manager_;  // not owned
+  DisplayManager* display_manager_;  // not owned
 
   DISALLOW_COPY_AND_ASSIGN(DisplayManagerTestApi);
 };
 
 }  // namespace test
 }  // namespace ash
 
 #endif  // ASH_TEST_DISPLAY_MANAGER_TEST_API_H_