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diff --git a/chromium/ash/wm/activation_controller.h b/chromium/ash/wm/activation_controller.h
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+++ b/chromium/ash/wm/activation_controller.h
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+// Copyright (c) 2012 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 ASH_WM_ACTIVATION_CONTROLLER_H_
+#define ASH_WM_ACTIVATION_CONTROLLER_H_
+
+#include "ash/ash_export.h"
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/observer_list.h"
+#include "base/scoped_observer.h"
+#include "ui/aura/client/activation_client.h"
+#include "ui/aura/client/focus_change_observer.h"
+#include "ui/aura/env_observer.h"
+#include "ui/aura/window_observer.h"
+#include "ui/base/events/event_handler.h"
+
+namespace aura {
+namespace client {
+class ActivationChangeObserver;
+class FocusClient;
+}
+}
+
+namespace ash {
+namespace internal {
+
+class ActivationControllerDelegate;
+
+// Exported for unit tests.
+class ASH_EXPORT ActivationController
+    : public aura::client::ActivationClient,
+      public aura::WindowObserver,
+      public aura::EnvObserver,
+      public aura::client::FocusChangeObserver,
+      public ui::EventHandler {
+ public:
+  // The ActivationController takes ownership of |delegate|.
+  ActivationController(aura::client::FocusClient* focus_client,
+                       ActivationControllerDelegate* delegate);
+  virtual ~ActivationController();
+
+  // Returns true if |window| exists within a container that supports
+  // activation. |event| is the event responsible for initiating the change, or
+  // NULL if there is no event.
+  static aura::Window* GetActivatableWindow(aura::Window* window,
+                                            const ui::Event* event);
+
+  // Overridden from aura::client::ActivationClient:
+  virtual void AddObserver(
+      aura::client::ActivationChangeObserver* observer) OVERRIDE;
+  virtual void RemoveObserver(
+      aura::client::ActivationChangeObserver* observer) OVERRIDE;
+  virtual void ActivateWindow(aura::Window* window) OVERRIDE;
+  virtual void DeactivateWindow(aura::Window* window) OVERRIDE;
+  virtual aura::Window* GetActiveWindow() OVERRIDE;
+  virtual aura::Window* GetActivatableWindow(aura::Window* window) OVERRIDE;
+  virtual aura::Window* GetToplevelWindow(aura::Window* window) OVERRIDE;
+  virtual bool OnWillFocusWindow(aura::Window* window,
+                                 const ui::Event* event) OVERRIDE;
+  virtual bool CanActivateWindow(aura::Window* window) const OVERRIDE;
+
+  // Overridden from aura::WindowObserver:
+  virtual void OnWindowVisibilityChanged(aura::Window* window,
+                                         bool visible) OVERRIDE;
+  virtual void OnWindowDestroying(aura::Window* window) OVERRIDE;
+
+  // Overridden from aura::EnvObserver:
+  virtual void OnWindowInitialized(aura::Window* window) OVERRIDE;
+
+  // Overridden from aura::client::FocusChangeObserver:
+  virtual void OnWindowFocused(aura::Window* gained_focus,
+                               aura::Window* lost_focus) OVERRIDE;
+
+ private:
+  // Overridden from ui::EventHandler:
+  virtual void OnKeyEvent(ui::KeyEvent* event) OVERRIDE;
+  virtual void OnMouseEvent(ui::MouseEvent* event) OVERRIDE;
+  virtual void OnScrollEvent(ui::ScrollEvent* event) OVERRIDE;
+  virtual void OnTouchEvent(ui::TouchEvent* event) OVERRIDE;
+  virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
+
+  // Implementation of ActivateWindow() with an Event.
+  void ActivateWindowWithEvent(aura::Window* window,
+                               const ui::Event* event);
+
+  // Shifts activation to the next window, ignoring |window|. Returns the next
+  // window.
+  aura::Window* ActivateNextWindow(aura::Window* window);
+
+  // Returns the next window that should be activated, ignoring |ignore|.
+  aura::Window* GetTopmostWindowToActivate(aura::Window* ignore) const;
+
+  // Returns the next window that should be activated in |container| ignoring
+  // the window |ignore|.
+  aura::Window* GetTopmostWindowToActivateInContainer(
+      aura::Window* container,
+      aura::Window* ignore) const;
+
+  // Called from the ActivationController's event handler implementation to
+  // handle focus to the |event|'s target. Not all targets are focusable or
+  // result in focus changes.
+  void FocusWindowWithEvent(const ui::Event* event);
+
+  aura::client::FocusClient* focus_client_;
+
+  // True inside ActivateWindow(). Used to prevent recursion of focus
+  // change notifications causing activation.
+  bool updating_activation_;
+
+  aura::Window* active_window_;
+
+  ObserverList<aura::client::ActivationChangeObserver> observers_;
+
+  ScopedObserver<aura::Window, aura::WindowObserver> observer_manager_;
+
+  scoped_ptr<ActivationControllerDelegate> delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(ActivationController);
+};
+
+}  // namespace internal
+}  // namespace ash
+
+#endif  // ASH_WM_ACTIVATION_CONTROLLER_H_