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

ui/wm/core/nested_accelerator_dispatcher.h

+// 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 UI_WM_CORE_NESTED_ACCELERATOR_DISPATCHER_H_
+#define UI_WM_CORE_NESTED_ACCELERATOR_DISPATCHER_H_
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "ui/wm/wm_export.h"
+
+namespace base {
+class MessagePumpDispatcher;
+class RunLoop;
+}
+
+namespace ui {
+class KeyEvent;
+}
+
+namespace wm {
+
+class NestedAcceleratorDelegate;
+
+// Dispatcher for handling accelerators from menu.
+//
+// Wraps a nested dispatcher to which control is passed if no accelerator key
+// has been pressed. If the nested dispatcher is NULL, then the control is
+// passed back to the default dispatcher.
+// TODO(pkotwicz): Add support for a |nested_dispatcher| which sends
+//  events to a system IME.
+class WM_EXPORT NestedAcceleratorDispatcher {
+ public:
+  virtual ~NestedAcceleratorDispatcher();
+
+  static scoped_ptr<NestedAcceleratorDispatcher> Create(
+      NestedAcceleratorDelegate* dispatcher_delegate,
+      base::MessagePumpDispatcher* nested_dispatcher);
+
+  // Creates a base::RunLoop object to run a nested message loop.
+  virtual scoped_ptr<base::RunLoop> CreateRunLoop() = 0;
+
+ protected:
+  explicit NestedAcceleratorDispatcher(NestedAcceleratorDelegate* delegate);
+
+  NestedAcceleratorDelegate*
+      delegate_;  // Owned by NestedAcceleratorController.
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(NestedAcceleratorDispatcher);
+};
+
+}  // namespace wm
+
+#endif  // UI_WM_CORE_NESTED_ACCELERATOR_DISPATCHER_H_