diff --git a/ash/screen_util.cc b/ash/screen_util.cc
index 29baadf4..ea11d87 100644
--- a/ash/screen_util.cc
+++ b/ash/screen_util.cc
@@ -14,6 +14,7 @@
 #include "ui/display/manager/display_manager.h"
 #include "ui/display/screen.h"
 #include "ui/gfx/geometry/size_conversions.h"
+#include "ui/wm/core/coordinate_conversion.h"
 
 namespace ash {
 
@@ -28,37 +29,18 @@
 
 // static
 gfx::Rect ScreenUtil::GetDisplayBoundsInParent(aura::Window* window) {
-  return ConvertRectFromScreen(
-      window->parent(),
-      display::Screen::GetScreen()->GetDisplayNearestWindow(window).bounds());
+  gfx::Rect result =
+      display::Screen::GetScreen()->GetDisplayNearestWindow(window).bounds();
+  ::wm::ConvertRectFromScreen(window->parent(), &result);
+  return result;
 }
 
 // static
 gfx::Rect ScreenUtil::GetDisplayWorkAreaBoundsInParent(aura::Window* window) {
-  return ConvertRectFromScreen(window->parent(),
-                               display::Screen::GetScreen()
-                                   ->GetDisplayNearestWindow(window)
-                                   .work_area());
+  gfx::Rect result =
+      display::Screen::GetScreen()->GetDisplayNearestWindow(window).work_area();
+  ::wm::ConvertRectFromScreen(window->parent(), &result);
+  return result;
 }
 
-// static
-gfx::Rect ScreenUtil::ConvertRectToScreen(aura::Window* window,
-                                          const gfx::Rect& rect) {
-  gfx::Point point = rect.origin();
-  aura::client::GetScreenPositionClient(window->GetRootWindow())
-      ->ConvertPointToScreen(window, &point);
-  return gfx::Rect(point, rect.size());
-}
-
-// static
-gfx::Rect ScreenUtil::ConvertRectFromScreen(aura::Window* window,
-                                            const gfx::Rect& rect) {
-  gfx::Point point = rect.origin();
-  aura::client::GetScreenPositionClient(window->GetRootWindow())
-      ->ConvertPointFromScreen(window, &point);
-  return gfx::Rect(point, rect.size());
-}
-
-// static
-
 }  // namespace ash