mash: wires up shadows for mash

ui/views/mus/desktop_window_tree_host_mus.cc

Index: ui/views/mus/desktop_window_tree_host_mus.cc
diff --git a/ui/views/mus/desktop_window_tree_host_mus.cc b/ui/views/mus/desktop_window_tree_host_mus.cc
index 26389b854b63277f398c351ed06a4e1e3b6a0313..3bd57d5dc174975b108ba1bb20130ecec810aab6 100644
--- a/ui/views/mus/desktop_window_tree_host_mus.cc
+++ b/ui/views/mus/desktop_window_tree_host_mus.cc
@@ -287,6 +287,8 @@ void DesktopWindowTreeHostMus::Init(aura::Window* content_window,
   aura::client::SetCursorClient(window(), cursor_manager_.get());
   InitHost();
 
+  NativeWidgetAura::SetShadowElevationFromInitParams(window(), params);
+
   // Transient parents are connected using the Window created by WindowTreeHost,
   // which is owned by the window manager. This way the window manager can
   // properly identify and honor transients.
@@ -717,6 +719,11 @@ bool DesktopWindowTreeHostMus::ShouldUseDesktopNativeCursorManager() const {
   return false;
 }
 
+bool DesktopWindowTreeHostMus::ShouldCreateVisibilityController() const {
+  // Window manager takes care of all top-level window animations.
+  return false;
+}
+
 void DesktopWindowTreeHostMus::OnWindowManagerFrameValuesChanged() {
   NonClientView* non_client_view =
       native_widget_delegate_->AsWidget()->non_client_view();