Refactor and move ash independent nested accelerator code to ui/wm/core

ash/accelerators/nested_accelerator_delegate.h

+// 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.
+
+#ifndef ASH_ACCELERATORS_NESTED_ACCELERATOR_DELEGATE_H_
+#define ASH_ACCELERATORS_NESTED_ACCELERATOR_DELEGATE_H_
+
+#include "base/macros.h"
+#include "ui/wm/core/nested_accelerator_delegate.h"
+
+namespace ash {
+
+class NestedAcceleratorDelegate : public wm::NestedAcceleratorDelegate {
+ public:
+  NestedAcceleratorDelegate();
+  virtual ~NestedAcceleratorDelegate();
+
+  // wm::AcceleratorDispatcher::Delegate
+  virtual bool ShouldProcessEventNow(const ui::KeyEvent& key_event) OVERRIDE;
+  virtual bool ProcessEvent(const ui::KeyEvent& key_event) OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(NestedAcceleratorDelegate);
+};
+
+}  // namespace
+
+#endif  // ASH_ACCELERATORS_NESTED_ACCELERATOR_DELEGATE_H_