Moves management of transients out of Window

ash/wm/drag_window_resizer.cc

Index: ash/wm/drag_window_resizer.cc
diff --git a/ash/wm/drag_window_resizer.cc b/ash/wm/drag_window_resizer.cc
index 000d1198419d9d40656f89f97839ebf1bb8813e3..15422a0d4b5bd84a67203e2cdc09f7fa1a56a202 100644
--- a/ash/wm/drag_window_resizer.cc
+++ b/ash/wm/drag_window_resizer.cc
@@ -22,6 +22,7 @@
 #include "ui/base/hit_test.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/gfx/screen.h"
+#include "ui/views/corewm/transient_window_manager.h"
 
 namespace ash {
 namespace internal {
@@ -212,7 +213,7 @@ void DragWindowResizer::UpdateDragWindow(const gfx::Rect& bounds,
 
 bool DragWindowResizer::ShouldAllowMouseWarp() {
   return (details_.window_component == HTCAPTION) &&
-      !GetTarget()->transient_parent() &&
+      !views::corewm::GetTransientParent(GetTarget()) &&
       (GetTarget()->type() == aura::client::WINDOW_TYPE_NORMAL ||
        GetTarget()->type() == aura::client::WINDOW_TYPE_PANEL);
 }
@@ -225,7 +226,7 @@ TrayUser* DragWindowResizer::GetTrayUserItemAtPoint(
 
   // Check that this is a drag move operation from a suitable window.
   if (details_.window_component != HTCAPTION ||
-      GetTarget()->transient_parent() ||
+      views::corewm::GetTransientParent(GetTarget()) ||
       (GetTarget()->type() != aura::client::WINDOW_TYPE_NORMAL &&
        GetTarget()->type() != aura::client::WINDOW_TYPE_PANEL &&
        GetTarget()->type() != aura::client::WINDOW_TYPE_POPUP))