Removes a couple more functions from WmWindow

ash/wm/overview/window_selector.cc

Index: ash/wm/overview/window_selector.cc
diff --git a/ash/wm/overview/window_selector.cc b/ash/wm/overview/window_selector.cc
index 12aa74d42deff5fc53cb9aa089bd988653bba5e5..cba7519ecbcfa0c5db56c064ba803e6e108c7b96 100644
--- a/ash/wm/overview/window_selector.cc
+++ b/ash/wm/overview/window_selector.cc
@@ -529,7 +529,7 @@ void WindowSelector::OnWindowHierarchyChanged(
     return;
 
   for (size_t i = 0; i < wm::kSwitchableWindowContainerIdsLength; ++i) {
-    if (new_window->GetParent()->GetShellWindowId() ==
+    if (new_window->GetParent()->aura_window()->id() ==
             wm::kSwitchableWindowContainerIds[i] &&
         !new_window->GetTransientParent()) {
       // The new window is in one of the switchable containers, abort overview.