Remove WmLookup.

ash/common/wm/overview/scoped_transform_overview_window.cc

Index: ash/common/wm/overview/scoped_transform_overview_window.cc
diff --git a/ash/common/wm/overview/scoped_transform_overview_window.cc b/ash/common/wm/overview/scoped_transform_overview_window.cc
index 393b02ac9b4b6a900f6ab929ca1bc7c5d8a8b441..68e932e17d97a043148e14a1c935f9a7b2ddc632 100644
--- a/ash/common/wm/overview/scoped_transform_overview_window.cc
+++ b/ash/common/wm/overview/scoped_transform_overview_window.cc
@@ -11,7 +11,6 @@
 #include "ash/common/wm/overview/scoped_overview_animation_settings_factory.h"
 #include "ash/common/wm/overview/window_selector_item.h"
 #include "ash/common/wm/window_state.h"
-#include "ash/common/wm_lookup.h"
 #include "ash/common/wm_shell.h"
 #include "ash/common/wm_window.h"
 #include "ash/common/wm_window_property.h"
@@ -469,7 +468,7 @@ void ScopedTransformOverviewWindow::OnMouseEvent(ui::MouseEvent* event) {
 WmWindow* ScopedTransformOverviewWindow::GetOverviewWindowForMinimizedState()
     const {
   return minimized_widget_
-             ? WmLookup::Get()->GetWindowForWidget(minimized_widget_.get())
+             ? WmWindow::Get(minimized_widget_.get()->GetNativeWindow())
              : nullptr;
 }