Make WindowState::CanMinimize() take into account WidgetDelegate::CanMinimize()

ash/wm/window_state.cc

Index: ash/wm/window_state.cc
diff --git a/ash/wm/window_state.cc b/ash/wm/window_state.cc
index e95dc4060222015b22b6c1f0da4b5486fd5b6e00..827fa1aff3f958514676b7687b7699bc5718f4a3 100644
--- a/ash/wm/window_state.cc
+++ b/ash/wm/window_state.cc
@@ -153,15 +153,7 @@ bool WindowState::CanMaximize() const {
 }
 
 bool WindowState::CanMinimize() const {
-  RootWindowController* controller = RootWindowController::ForWindow(window_);
-  if (!controller)
-    return false;
-  aura::Window* lockscreen =
-      controller->GetContainer(kShellWindowId_LockScreenContainersContainer);
-  if (lockscreen->Contains(window_))
-    return false;
-
-  return true;
+  return window()->GetProperty(aura::client::kCanMinimizeKey);
 }
 
 bool WindowState::CanResize() const {