chromeos: converts WindowResizer to aura::Window

ash/wm/drag_window_resizer_unittest.cc

Index: ash/wm/drag_window_resizer_unittest.cc
diff --git a/ash/wm/drag_window_resizer_unittest.cc b/ash/wm/drag_window_resizer_unittest.cc
index d66a30dc988210a4acacf1416f98017b22bd44f2..137f033f59dcf260a658f85c13e3a5560b0b0640 100644
--- a/ash/wm/drag_window_resizer_unittest.cc
+++ b/ash/wm/drag_window_resizer_unittest.cc
@@ -140,8 +140,7 @@ class DragWindowResizerTest : public test::AshTestBase {
       aura::Window* window,
       const gfx::Point& point_in_parent,
       int window_component) {
-    return CreateWindowResizer(WmWindow::Get(window), point_in_parent,
-                               window_component,
+    return CreateWindowResizer(window, point_in_parent, window_component,
                                aura::client::WINDOW_MOVE_SOURCE_MOUSE)
         .release();
   }