Update window_parenting_utils to use aura::window

ash/common/wm/dock/docked_window_resizer.cc

Index: ash/common/wm/dock/docked_window_resizer.cc
diff --git a/ash/common/wm/dock/docked_window_resizer.cc b/ash/common/wm/dock/docked_window_resizer.cc
index f2ea238d33dc9ccd9be4789d6c6a8374a2bab216..7b21be99c9c92a10aa69d95a0dd766ce6dd114a7 100644
--- a/ash/common/wm/dock/docked_window_resizer.cc
+++ b/ash/common/wm/dock/docked_window_resizer.cc
@@ -189,7 +189,8 @@ void DockedWindowResizer::StartedDragging(
         GetTarget()->GetRootWindow()->GetChildByShellWindowId(
             kShellWindowId_DockedContainer);
     wm::ReparentChildWithTransientChildren(
-        GetTarget(), GetTarget()->GetParent(), docked_container);
+        GetTarget()->aura_window(), GetTarget()->GetParent()->aura_window(),
+        docked_container->aura_window());
     if (!resizer)
       return;
   }
@@ -266,8 +267,9 @@ DockedAction DockedWindowResizer::MaybeReparentWindowOnDragCompletion(
   if ((is_resized || !is_attached_panel) &&
       is_docked_ != (window->GetParent() == dock_container)) {
     if (is_docked_) {
-      wm::ReparentChildWithTransientChildren(window, window->GetParent(),
-                                             dock_container);
+      wm::ReparentChildWithTransientChildren(window->aura_window(),
+                                             window->GetParent()->aura_window(),
+                                             dock_container->aura_window());
       action = DOCKED_ACTION_DOCK;
     } else if (window->GetParent()->GetShellWindowId() ==
                kShellWindowId_DockedContainer) {
@@ -282,8 +284,9 @@ DockedAction DockedWindowResizer::MaybeReparentWindowOnDragCompletion(
       WmWindow* previous_parent = window->GetParent();
       window->SetParentUsingContext(window, near_last_location);
       if (window->GetParent() != previous_parent) {
-        wm::ReparentTransientChildrenOfChild(window, previous_parent,
-                                             window->GetParent());
+        wm::ReparentTransientChildrenOfChild(
+            window->aura_window(), previous_parent->aura_window(),
+            window->GetParent()->aura_window());
       }
       action = was_docked_ ? DOCKED_ACTION_UNDOCK : DOCKED_ACTION_NONE;
     }