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

ash/wm/window_resizer.cc

Index: ash/wm/window_resizer.cc
diff --git a/ash/wm/window_resizer.cc b/ash/wm/window_resizer.cc
index 08ff0c42fec07d859f6c2229c055d7ec262ae785..fbdc29c7e69d46e7e87cb81e40c4c9fe4979280d 100644
--- a/ash/wm/window_resizer.cc
+++ b/ash/wm/window_resizer.cc
@@ -20,6 +20,7 @@
 #include "ui/compositor/scoped_layer_animation_settings.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/screen.h"
+#include "ui/wm/core/coordinate_conversion.h"
 
 namespace ash {
 
@@ -204,7 +205,7 @@ gfx::Rect WindowResizer::CalculateBoundsForDrag(
     // for the current display but the window can move to a different one.
     aura::Window* parent = GetTarget()->parent();
     gfx::Point passed_location_in_screen(passed_location);
-    wm::ConvertPointToScreen(parent, &passed_location_in_screen);
+    ::wm::ConvertPointToScreen(parent, &passed_location_in_screen);
     gfx::Rect near_passed_location(passed_location_in_screen, gfx::Size());
     // Use a pointer location (matching the logic in DragWindowResizer) to
     // calculate the target display after the drag.