Relocate display_manager from ash to ui

ash/display/display_util_unittest.cc

 // Copyright 2014 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_util.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
-#include "ash/test/display_manager_test_api.h"
 
 namespace ash {
 
 typedef test::AshTestBase DisplayUtilTest;
 
 TEST_F(DisplayUtilTest, RotatedDisplay) {
   if (!SupportsMultipleDisplays())
     return;
   {
     UpdateDisplay("10+10-500x400,600+10-1000x600/r");
@@ skipping 64 matching lines @@
     AshWindowTreeHost* host1 =
         GetRootWindowController(root_windows[1])->ash_host();
     gfx::Rect rect0 = GetNativeEdgeBounds(host0, gfx::Rect(499, 10, 1, 300));
     gfx::Rect rect1 = GetNativeEdgeBounds(host1, gfx::Rect(500, 10, 1, 300));
     EXPECT_EQ("10,99 1x300", rect0.ToString());
     EXPECT_EQ("600,20 1x300", rect1.ToString());
   }
 }
 
 }  // namespace ash