Convert TrayEventFilter to wm common types

chrome/browser/ui/ash/chrome_shell_delegate.cc

Index: chrome/browser/ui/ash/chrome_shell_delegate.cc
diff --git a/chrome/browser/ui/ash/chrome_shell_delegate.cc b/chrome/browser/ui/ash/chrome_shell_delegate.cc
index cd8ee4438f5ab640d070b203dfb1691bc4a97d41..b606869c9c2a5a498dcae72a43c86f064692f593 100644
--- a/chrome/browser/ui/ash/chrome_shell_delegate.cc
+++ b/chrome/browser/ui/ash/chrome_shell_delegate.cc
@@ -15,7 +15,6 @@
 #include "ash/common/wm/mru_window_tracker.h"
 #include "ash/common/wm/window_state.h"
 #include "ash/common/wm_shell.h"
-#include "ash/container_delegate_aura.h"
 #include "ash/content/gpu_support_impl.h"
 #include "ash/pointer_watcher_delegate_aura.h"
 #include "ash/shell.h"
@@ -430,11 +429,6 @@ ash::ShelfDelegate* ChromeShellDelegate::CreateShelfDelegate(
   return shelf_delegate_;
 }
 
-std::unique_ptr<ash::ContainerDelegate>
-ChromeShellDelegate::CreateContainerDelegate() {
-  return base::WrapUnique(new ash::ContainerDelegateAura);
-}
-
 std::unique_ptr<ash::PointerWatcherDelegate>
 ChromeShellDelegate::CreatePointerWatcherDelegate() {
   return base::WrapUnique(new ash::PointerWatcherDelegateAura);