Revert 114095 - Move the concept of Activation to the Shell.

ui/aura/test/test_activation_client.h

-// Copyright (c) 2011 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.
-
-#ifndef UI_AURA_TEST_TEST_ACTIVATION_CLIENT_H_
-#define UI_AURA_TEST_TEST_ACTIVATION_CLIENT_H_
-#pragma once
-
-#include "base/compiler_specific.h"
-#include "base/logging.h"
-#include "ui/aura/client/activation_client.h"
-#include "ui/aura/window_observer.h"
-
-namespace aura {
-namespace test {
-
-class TestActivationClient : public ActivationClient, public WindowObserver {
- public:
-  TestActivationClient();
-  virtual ~TestActivationClient();
-
-  // Overridden from ActivationClient:
-  virtual void ActivateWindow(Window* window) OVERRIDE;
-  virtual void DeactivateWindow(Window* window) OVERRIDE;
-  virtual Window* GetActiveWindow() OVERRIDE;
-  virtual bool CanFocusWindow(Window* window) const OVERRIDE;
-
-  // Overridden from WindowObserver:
-  virtual void OnWindowDestroyed(Window* window) OVERRIDE;
-
- private:
-  // This class explicitly does NOT store the active window in a window property
-  // to make sure that storing the active window in a property is not treated as
-  // part of the aura API. Assumptions to that end will cause tests that use
-  // this client to fail.
-  Window* active_window_;
-
-  DISALLOW_COPY_AND_ASSIGN(TestActivationClient);
-};
-
-}  // namespace test
-}  // namespace aura
-
-#endif  // UI_AURA_TEST_TEST_ACTIVATION_CLIENT_H_