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

ash/wm/drag_window_resizer.cc

Index: ash/wm/drag_window_resizer.cc
diff --git a/ash/wm/drag_window_resizer.cc b/ash/wm/drag_window_resizer.cc
index 214dbc5c730c3030b258dace74be5a933d2d7b72..15b05846752084a19779cc8f3514776a21a92d40 100644
--- a/ash/wm/drag_window_resizer.cc
+++ b/ash/wm/drag_window_resizer.cc
@@ -20,7 +20,6 @@
 #include "ui/base/hit_test.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/gfx/screen.h"
-#include "ui/wm/core/coordinate_conversion.h"
 #include "ui/wm/core/window_util.h"
 
 namespace ash {
@@ -80,7 +79,7 @@
   // Show a phantom window for dragging in another root window.
   if (HasSecondaryRootWindow()) {
     gfx::Point location_in_screen = location;
-    ::wm::ConvertPointToScreen(GetTarget()->parent(), &location_in_screen);
+    wm::ConvertPointToScreen(GetTarget()->parent(), &location_in_screen);
     const bool in_original_root =
         wm::GetRootWindowAt(location_in_screen) == GetTarget()->GetRootWindow();
     UpdateDragWindow(GetTarget()->bounds(), in_original_root);
@@ -97,8 +96,8 @@
 
   // Check if the destination is another display.
   gfx::Point last_mouse_location_in_screen = last_mouse_location_;
-  ::wm::ConvertPointToScreen(GetTarget()->parent(),
-                             &last_mouse_location_in_screen);
+  wm::ConvertPointToScreen(GetTarget()->parent(),
+                           &last_mouse_location_in_screen);
   gfx::Screen* screen = Shell::GetScreen();
   const gfx::Display dst_display =
       screen->GetDisplayNearestPoint(last_mouse_location_in_screen);