Revert of Moving coordinate conversion methods from ash/wm to ui/wm.

ui/wm/core/coordinate_conversion.cc

Index: ui/wm/core/coordinate_conversion.cc
diff --git a/ui/wm/core/coordinate_conversion.cc b/ui/wm/core/coordinate_conversion.cc
deleted file mode 100644
index 6227b3783dd248f4b49173dd8c0f041228b1a919..0000000000000000000000000000000000000000
--- a/ui/wm/core/coordinate_conversion.cc
+++ /dev/null
@@ -1,29 +0,0 @@
-// 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 "ui/wm/core/coordinate_conversion.h"
-
-#include "ui/aura/client/screen_position_client.h"
-#include "ui/gfx/point.h"
-
-namespace wm {
-
-void ConvertPointToScreen(const aura::Window* window, gfx::Point* point) {
-  DCHECK(window);
-  DCHECK(window->GetRootWindow());
-  DCHECK(aura::client::GetScreenPositionClient(window->GetRootWindow()));
-  aura::client::GetScreenPositionClient(window->GetRootWindow())->
-      ConvertPointToScreen(window, point);
-}
-
-void ConvertPointFromScreen(const aura::Window* window,
-                            gfx::Point* point_in_screen) {
-  DCHECK(window);
-  DCHECK(window->GetRootWindow());
-  DCHECK(aura::client::GetScreenPositionClient(window->GetRootWindow()));
-  aura::client::GetScreenPositionClient(window->GetRootWindow())->
-      ConvertPointFromScreen(window, point_in_screen);
-}
-
-}  // namespace wm