Remove dispatcher when shutting down RootWindowController

ash/wm/root_window_layout_manager.cc

Index: ash/wm/root_window_layout_manager.cc
diff --git a/ash/wm/root_window_layout_manager.cc b/ash/wm/root_window_layout_manager.cc
index 282dbed08dd7f59744d8b98fd1e90463b83d498f..65b71f44b9bd692ac5d99b298c92a279af889724 100644
--- a/ash/wm/root_window_layout_manager.cc
+++ b/ash/wm/root_window_layout_manager.cc
@@ -6,7 +6,6 @@
 
 #include "ash/desktop_background/desktop_background_widget_controller.h"
 #include "ash/root_window_controller.h"
-#include "ash/root_window_settings.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/compositor/layer.h"
 #include "ui/views/widget/widget.h"
@@ -28,10 +27,6 @@ RootWindowLayoutManager::~RootWindowLayoutManager() {
 // RootWindowLayoutManager, aura::LayoutManager implementation:
 
 void RootWindowLayoutManager::OnWindowResized() {
-  // X event may arrive during shutdown.
-  if (GetRootWindowSettings(owner_->GetRootWindow())->shutdown)
-    return;
-
   gfx::Rect fullscreen_bounds =
       gfx::Rect(owner_->bounds().width(), owner_->bounds().height());