[mus+ash] Removes WmWindow from ash/wm/mru_window_tracker and overview mode

ash/wm/panels/panel_layout_manager_unittest.cc

Index: ash/wm/panels/panel_layout_manager_unittest.cc
diff --git a/ash/wm/panels/panel_layout_manager_unittest.cc b/ash/wm/panels/panel_layout_manager_unittest.cc
index d9f402196e843c4976cb67c58ec7d878e9ea1d72..0ea8f0281109a079ca66cf2355f62f0291568355 100644
--- a/ash/wm/panels/panel_layout_manager_unittest.cc
+++ b/ash/wm/panels/panel_layout_manager_unittest.cc
@@ -852,8 +852,8 @@ TEST_F(PanelLayoutManagerTest, PanelsHideAndRestoreWithShelf) {
 
   // While in full-screen mode, the panel windows should still be in the
   // switchable window list - http://crbug.com/313919.
-  aura::Window::Windows switchable_window_list = WmWindow::ToAuraWindows(
-      Shell::Get()->mru_window_tracker()->BuildMruWindowList());
+  aura::Window::Windows switchable_window_list =
+      Shell::Get()->mru_window_tracker()->BuildMruWindowList();
   EXPECT_EQ(3u, switchable_window_list.size());
   EXPECT_NE(switchable_window_list.end(),
             std::find(switchable_window_list.begin(),