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

ui/wm/core/coordinate_conversion.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 "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