Eliminate ash::internal namespace

chrome/browser/extensions/api/system_display/display_info_provider_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 "chrome/browser/extensions/api/system_display/display_info_provider.h"
 
 #include "ash/display/display_controller.h"
 #include "ash/display/display_manager.h"
 #include "ash/screen_util.h"
 #include "ash/shell.h"
@@ skipping 23 matching lines @@
     (*error).clear();
     *success = DisplayInfoProvider::Get()->SetInfo(display_id, info, error);
   }
 
   bool DisplayExists(int64 display_id) const {
     const gfx::Display& display =
         GetDisplayManager()->GetDisplayForId(display_id);
     return display.id() != gfx::Display::kInvalidDisplayID;
   }
 
-  ash::internal::DisplayManager* GetDisplayManager() const {
+  ash::DisplayManager* GetDisplayManager() const {
     return ash::Shell::GetInstance()->display_manager();
   }
 
   ash::DisplayController* GetDisplayController() const {
     return ash::Shell::GetInstance()->display_controller();
   }
 
   std::string SystemInfoDisplayInsetsToString(
       const api::system_display::Insets& insets) const {
     // Order to match gfx::Insets::ToString().
@@ skipping 829 matching lines @@
   CallSetDisplayUnitInfo(base::Int64ToString(internal_display_id), info,
       &success, &error);
 
   ASSERT_FALSE(success);
   EXPECT_EQ("Overscan changes not allowed for the internal monitor.",
             error);
 }
 
 }  // namespace
 }  // namespace extensions