Separate ash::test::DisplayManagerTestApi from ash

chrome/browser/ui/window_sizer/window_sizer_ash_unittest.cc

Index: chrome/browser/ui/window_sizer/window_sizer_ash_unittest.cc
diff --git a/chrome/browser/ui/window_sizer/window_sizer_ash_unittest.cc b/chrome/browser/ui/window_sizer/window_sizer_ash_unittest.cc
index 1d199f8aa7b3904ed1d7b56dc7ff3be53cc0b828..2fb71e99fd176b4bbb0799ee018c6505ffc9b8e7 100644
--- a/chrome/browser/ui/window_sizer/window_sizer_ash_unittest.cc
+++ b/chrome/browser/ui/window_sizer/window_sizer_ash_unittest.cc
@@ -8,7 +8,7 @@
 #include "ash/common/wm/window_state.h"
 #include "ash/common/wm_shell.h"
 #include "ash/common/wm_window.h"
-#include "ash/screen_util.h"
+#include "ash/display/display_manager.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/wm/window_state_aura.h"
@@ -561,7 +561,8 @@ TEST_F(WindowSizerAshTest, MAYBE_PlaceNewWindowsOnMultipleDisplays) {
   UpdateDisplay("1600x1200,1600x1200");
   gfx::Rect primary_bounds =
       display::Screen::GetScreen()->GetPrimaryDisplay().bounds();
-  gfx::Rect secondary_bounds = ash::ScreenUtil::GetSecondaryDisplay().bounds();
+  gfx::Rect secondary_bounds =
+      display_manager()->GetSecondaryDisplay().bounds();
 
   std::unique_ptr<TestingProfile> profile(new TestingProfile());