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diff --git a/chromium/ash/accelerators/nested_dispatcher_controller.h b/chromium/ash/accelerators/nested_dispatcher_controller.h
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+++ b/chromium/ash/accelerators/nested_dispatcher_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_ACCELERATORS_NESTED_DISPATCHER_CONTROLLER_H_
+#define ASH_ACCELERATORS_NESTED_DISPATCHER_CONTROLLER_H_
+
+#include "ash/ash_export.h"
+#include "base/message_loop/message_loop.h"
+#include "ui/aura/client/dispatcher_client.h"
+#include "ui/aura/window.h"
+
+namespace ash {
+
+// Creates a dispatcher which wraps another dispatcher.
+// The outer dispatcher runs first and performs ash specific handling.
+// If it does not consume the event it forwards the event to the nested
+// dispatcher.
+class ASH_EXPORT NestedDispatcherController
+    : public aura::client::DispatcherClient {
+ public:
+  NestedDispatcherController();
+  virtual ~NestedDispatcherController();
+
+  virtual void RunWithDispatcher(base::MessageLoop::Dispatcher* dispatcher,
+                                 aura::Window* associated_window,
+                                 bool nestable_tasks_allowed) OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(NestedDispatcherController);
+};
+
+}  // namespace ash
+
+#endif  // ASH_ACCELERATORS_NESTED_DISPATCHER_CONTROLLER_H_