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

ash/wm/dock/docked_window_layout_manager_unittest.cc

Index: ash/wm/dock/docked_window_layout_manager_unittest.cc
diff --git a/ash/wm/dock/docked_window_layout_manager_unittest.cc b/ash/wm/dock/docked_window_layout_manager_unittest.cc
index a8054a39b9a768f44632e40e1b16ddc5e866765f..48db1547dc6ede7d19ae16e0f3d1644590159c65 100644
--- a/ash/wm/dock/docked_window_layout_manager_unittest.cc
+++ b/ash/wm/dock/docked_window_layout_manager_unittest.cc
@@ -33,7 +33,6 @@
 #include "ui/base/hit_test.h"
 #include "ui/gfx/screen.h"
 #include "ui/views/widget/widget.h"
-#include "ui/wm/core/coordinate_conversion.h"
 
 namespace ash {
 
@@ -189,7 +188,7 @@
     gfx::Rect work_area =
         Shell::GetScreen()->GetDisplayNearestWindow(window).work_area();
     gfx::Point initial_location_in_screen = initial_location_in_parent_;
-    ::wm::ConvertPointToScreen(window->parent(), &initial_location_in_screen);
+    wm::ConvertPointToScreen(window->parent(), &initial_location_in_screen);
     // Drag the window left or right to the edge (or almost to it).
     if (edge == DOCKED_EDGE_LEFT)
       dx += work_area.x() - initial_location_in_screen.x();