Allow dynamic enabling/disabling of unified desktop

ash/magnifier/magnification_controller_unittest.cc

 // Copyright (c) 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/magnifier/magnification_controller.h"
 
+#include "ash/display/display_manager.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
-#include "ash/test/display_manager_test_api.h"
 #include "base/strings/stringprintf.h"
 #include "ui/aura/env.h"
 #include "ui/aura/test/aura_test_utils.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/base/ime/input_method.h"
 #include "ui/chromeos/accessibility_types.h"
 #include "ui/events/test/event_generator.h"
 #include "ui/gfx/geometry/rect_conversions.h"
 #include "ui/gfx/screen.h"
 #include "ui/views/controls/textfield/textfield.h"
@@ skipping 643 matching lines @@
   EXPECT_TRUE(new_view_port.Contains(text_input_bounds));
   gfx::Rect caret_bounds = GetCaretBounds();
   EXPECT_EQ(caret_bounds.CenterPoint(), new_view_port.CenterPoint());
 }
 
 
 // Make sure that unified desktop can enter magnified mode.
 TEST_F(MagnificationControllerTest, EnableMagnifierInUnifiedDesktop) {
   if (!SupportsMultipleDisplays())
     return;
-  test::DisplayManagerTestApi::EnableUnifiedDesktopForTest();
+  Shell::GetInstance()->display_manager()->SetUnifiedDesktopEnabled(true);
 
   EXPECT_EQ(1.0f, GetMagnificationController()->GetScale());
 
   GetMagnificationController()->SetEnabled(true);
 
   gfx::Screen* screen =
       gfx::Screen::GetScreenFor(Shell::GetPrimaryRootWindow());
 
   UpdateDisplay("500x500, 500x500");
   EXPECT_EQ("0,0 1000x500", screen->GetPrimaryDisplay().bounds().ToString());
   EXPECT_EQ(2.0f, GetMagnificationController()->GetScale());
 
   GetMagnificationController()->SetEnabled(false);
 
   EXPECT_EQ(1.0f, GetMagnificationController()->GetScale());
 
   GetMagnificationController()->SetEnabled(true);
   EXPECT_EQ(2.0f, GetMagnificationController()->GetScale());
 
   UpdateDisplay("500x500");
   EXPECT_EQ("0,0 500x500", screen->GetPrimaryDisplay().bounds().ToString());
   EXPECT_EQ(2.0f, GetMagnificationController()->GetScale());
 
   GetMagnificationController()->SetEnabled(false);
   EXPECT_EQ("0,0 500x500", screen->GetPrimaryDisplay().bounds().ToString());
   EXPECT_EQ(1.0f, GetMagnificationController()->GetScale());
 }
 
 }  // namespace ash