It is time.

ui/wm/core/transient_window_controller.cc

Index: ui/wm/core/transient_window_controller.cc
diff --git a/ui/wm/core/transient_window_controller.cc b/ui/wm/core/transient_window_controller.cc
deleted file mode 100644
index bb1945c09b2e89e75fe20f54ba3e618cfe39f034..0000000000000000000000000000000000000000
--- a/ui/wm/core/transient_window_controller.cc
+++ /dev/null
@@ -1,40 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "ui/wm/core/transient_window_controller.h"
-
-#include "ui/wm/core/transient_window_manager.h"
-
-namespace wm {
-
-TransientWindowController::TransientWindowController() {
-}
-
-TransientWindowController::~TransientWindowController() {
-}
-
-void TransientWindowController::AddTransientChild(aura::Window* parent,
-                                                  aura::Window* child) {
-  TransientWindowManager::Get(parent)->AddTransientChild(child);
-}
-
-void TransientWindowController::RemoveTransientChild(aura::Window* parent,
-                                                     aura::Window* child) {
-  TransientWindowManager::Get(parent)->RemoveTransientChild(child);
-}
-
-aura::Window* TransientWindowController::GetTransientParent(
-    aura::Window* window) {
-  return const_cast<aura::Window*>(GetTransientParent(
-      const_cast<const aura::Window*>(window)));
-}
-
-const aura::Window* TransientWindowController::GetTransientParent(
-    const aura::Window* window) {
-  const TransientWindowManager* window_manager =
-      TransientWindowManager::Get(window);
-  return window_manager ? window_manager->transient_parent() : NULL;
-}
-
-}  // namespace wm