Move DisplayManager and DisplayChangeObserverX11 from aura to ash.

ash/test/ash_test_base.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_ASH_TEST_BASE_H_
 #define ASH_TEST_ASH_TEST_BASE_H_
 
 #include <string>
 
 #include "ash/shell.h"
 #include "base/compiler_specific.h"
 #include "base/message_loop.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/views/test/test_views_delegate.h"
 
 namespace ash {
 namespace internal {
-class MultiDisplayManager;
+class DisplayManager;
 }  // internal
 
 namespace test {
 
 class AshTestViewsDelegate : public views::TestViewsDelegate {
  public:
   // Overriden from TestViewsDelegate.
   virtual content::WebContents* CreateWebContents(
       content::BrowserContext* browser_context,
       content::SiteInstance* site_instance) OVERRIDE;
 };
 
 class AshTestBase : public testing::Test {
  public:
   AshTestBase();
   virtual ~AshTestBase();
 
   MessageLoopForUI* message_loop() { return &message_loop_; }
 
   // testing::Test:
   virtual void SetUp() OVERRIDE;
   virtual void TearDown() OVERRIDE;
 
   // Change the primary display's configuration to use |bounds|
   // and |scale|.
   void ChangeDisplayConfig(float scale, const gfx::Rect& bounds);
 
   // Update the display configuration as given in |display_specs|.
-  // See ash::test::MultiDisplayManagerTestApi::UpdateDisplay for more details.
+  // See ash::test::DisplayManagerTestApi::UpdateDisplay for more details.
   void UpdateDisplay(const std::string& display_specs);
 
  protected:
   void RunAllPendingInMessageLoop();
 
  private:
   MessageLoopForUI message_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(AshTestBase);
 };
 
 }  // namespace test
 }  // namespace ash
 
 #endif  // ASH_TEST_ASH_TEST_BASE_H_