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

ash/accelerators/nested_accelerator_delegate.cc

-// 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.
-
-#include "ash/accelerators/nested_accelerator_delegate.h"
-
-#include "ash/accelerators/accelerator_controller.h"
-#include "ash/shell.h"
-#include "ui/aura/window_event_dispatcher.h"
-#include "ui/base/accelerators/accelerator.h"
-#include "ui/events/event.h"
-#include "ui/events/event_constants.h"
-#include "ui/events/event_utils.h"
-#include "ui/views/controls/menu/menu_controller.h"
-
-namespace ash {
-namespace {
-
-bool IsPossibleAcceleratorNotForMenu(const ui::KeyEvent& key_event) {
-  // For shortcuts generated by Ctrl or Alt plus a letter, number or
-  // the tab key, we want to exit the context menu first and then
-  // repost the event. That allows for the shortcut execution after
-  // the context menu has exited.
-  if (key_event.type() == ui::ET_KEY_PRESSED &&
-      (key_event.flags() & (ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN))) {
-    const ui::KeyboardCode key_code = key_event.key_code();
-    if ((key_code >= ui::VKEY_A && key_code <= ui::VKEY_Z) ||
-        (key_code >= ui::VKEY_0 && key_code <= ui::VKEY_9) ||
-        (key_code == ui::VKEY_TAB)) {
-      return true;
-    }
-  }
-  return false;
-}
-
-}  // namespace
-
-NestedAcceleratorDelegate::NestedAcceleratorDelegate() {
-}
-
-NestedAcceleratorDelegate::~NestedAcceleratorDelegate() {
-}
-
-bool NestedAcceleratorDelegate::ShouldProcessEventNow(
-    const ui::KeyEvent& key_event) {
-  if (!IsPossibleAcceleratorNotForMenu(key_event))
-    return true;
-
-  if (views::MenuController* menu_controller =
-          views::MenuController::GetActiveInstance()) {
-    menu_controller->CancelAll();
-    return false;
-  }
-  return true;
-}
-
-bool NestedAcceleratorDelegate::ProcessEvent(const ui::KeyEvent& key_event) {
-  ash::AcceleratorController* accelerator_controller =
-      ash::Shell::GetInstance()->accelerator_controller();
-  if (!accelerator_controller)
-    return false;
-  const int kModifierMask =
-      (ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN);
-  ui::Accelerator accelerator(key_event.key_code(),
-                              key_event.flags() & kModifierMask);
-  if (key_event.type() == ui::ET_KEY_RELEASED)
-    accelerator.set_type(ui::ET_KEY_RELEASED);
-  // Fill out context object so AcceleratorController will know what
-  // was the previous accelerator or if the current accelerator is repeated.
-  Shell::GetInstance()->accelerator_controller()->context()->UpdateContext(
-      accelerator);
-  return accelerator_controller->Process(accelerator);
-}
-
-}  // namespace ash