Convert TrayEventFilter to wm common types

ash/test/test_shell_delegate.cc

Index: ash/test/test_shell_delegate.cc
diff --git a/ash/test/test_shell_delegate.cc b/ash/test/test_shell_delegate.cc
index 4e304fccebf5f066c9b2404eda2e263634b194c6..5f91587bf85c3f5501d89af189575a2ea652ca7a 100644
--- a/ash/test/test_shell_delegate.cc
+++ b/ash/test/test_shell_delegate.cc
@@ -12,7 +12,6 @@
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/shell_window_ids.h"
 #include "ash/common/wm/window_state.h"
-#include "ash/container_delegate_aura.h"
 #include "ash/gpu_support_stub.h"
 #include "ash/media_delegate.h"
 #include "ash/new_window_delegate.h"
@@ -206,11 +205,6 @@ MediaDelegate* TestShellDelegate::CreateMediaDelegate() {
   return new MediaDelegateImpl;
 }
 
-std::unique_ptr<ash::ContainerDelegate>
-TestShellDelegate::CreateContainerDelegate() {
-  return base::WrapUnique(new ContainerDelegateAura);
-}
-
 std::unique_ptr<PointerWatcherDelegate>
 TestShellDelegate::CreatePointerWatcherDelegate() {
   return base::WrapUnique(new PointerWatcherDelegateAura);