It is time.

ui/views/controls/menu/menu_controller.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 "ui/views/controls/menu/menu_controller.h"
-
-#include "base/i18n/case_conversion.h"
-#include "base/i18n/rtl.h"
-#include "base/strings/utf_string_conversions.h"
-#include "base/time/time.h"
-#include "ui/base/dragdrop/drag_utils.h"
-#include "ui/base/dragdrop/os_exchange_data.h"
-#include "ui/events/event.h"
-#include "ui/events/event_utils.h"
-#include "ui/gfx/canvas.h"
-#include "ui/gfx/native_widget_types.h"
-#include "ui/gfx/point.h"
-#include "ui/gfx/screen.h"
-#include "ui/gfx/vector2d.h"
-#include "ui/native_theme/native_theme.h"
-#include "ui/views/controls/button/menu_button.h"
-#include "ui/views/controls/menu/menu_config.h"
-#include "ui/views/controls/menu/menu_controller_delegate.h"
-#include "ui/views/controls/menu/menu_host_root_view.h"
-#include "ui/views/controls/menu/menu_item_view.h"
-#include "ui/views/controls/menu/menu_message_loop.h"
-#include "ui/views/controls/menu/menu_scroll_view_container.h"
-#include "ui/views/controls/menu/submenu_view.h"
-#include "ui/views/drag_utils.h"
-#include "ui/views/focus/view_storage.h"
-#include "ui/views/mouse_constants.h"
-#include "ui/views/view.h"
-#include "ui/views/view_constants.h"
-#include "ui/views/views_delegate.h"
-#include "ui/views/widget/root_view.h"
-#include "ui/views/widget/tooltip_manager.h"
-#include "ui/views/widget/widget.h"
-
-#if defined(OS_WIN)
-#include "ui/base/win/internal_constants.h"
-#include "ui/gfx/win/dpi.h"
-#include "ui/views/win/hwnd_util.h"
-#endif
-
-using base::Time;
-using base::TimeDelta;
-using ui::OSExchangeData;
-
-// Period of the scroll timer (in milliseconds).
-static const int kScrollTimerMS = 30;
-
-// Amount of time from when the drop exits the menu and the menu is hidden.
-static const int kCloseOnExitTime = 1200;
-
-// If a context menu is invoked by touch, we shift the menu by this offset so
-// that the finger does not obscure the menu.
-static const int kCenteredContextMenuYOffset = -15;
-
-namespace views {
-
-namespace {
-
-// When showing context menu on mouse down, the user might accidentally select
-// the menu item on the subsequent mouse up. To prevent this, we add the
-// following delay before the user is able to select an item.
-static int menu_selection_hold_time_ms = kMinimumMsPressedToActivate;
-
-// The spacing offset for the bubble tip.
-const int kBubbleTipSizeLeftRight = 12;
-const int kBubbleTipSizeTopBottom = 11;
-
-// The maximum distance (in DIPS) that the mouse can be moved before it should
-// trigger a mouse menu item activation (regardless of how long the menu has
-// been showing).
-const float kMaximumLengthMovedToActivate = 4.0f;
-
-// Returns true if the mnemonic of |menu| matches key.
-bool MatchesMnemonic(MenuItemView* menu, base::char16 key) {
-  return key != 0 && menu->GetMnemonic() == key;
-}
-
-// Returns true if |menu| doesn't have a mnemonic and first character of the its
-// title is |key|.
-bool TitleMatchesMnemonic(MenuItemView* menu, base::char16 key) {
-  if (menu->GetMnemonic())
-    return false;
-
-  base::string16 lower_title = base::i18n::ToLower(menu->title());
-  return !lower_title.empty() && lower_title[0] == key;
-}
-
-}  // namespace
-
-// Returns the first descendant of |view| that is hot tracked.
-static CustomButton* GetFirstHotTrackedView(View* view) {
-  if (!view)
-    return NULL;
-  CustomButton* button = CustomButton::AsCustomButton(view);
-  if (button) {
-    if (button->IsHotTracked())
-      return button;
-  }
-
-  for (int i = 0; i < view->child_count(); ++i) {
-    CustomButton* hot_view = GetFirstHotTrackedView(view->child_at(i));
-    if (hot_view)
-      return hot_view;
-  }
-  return NULL;
-}
-
-// Recurses through the child views of |view| returning the first view starting
-// at |start| that is focusable. A value of -1 for |start| indicates to start at
-// the first view (if |forward| is false, iterating starts at the last view). If
-// |forward| is true the children are considered first to last, otherwise last
-// to first.
-static View* GetFirstFocusableView(View* view, int start, bool forward) {
-  if (forward) {
-    for (int i = start == -1 ? 0 : start; i < view->child_count(); ++i) {
-      View* deepest = GetFirstFocusableView(view->child_at(i), -1, forward);
-      if (deepest)
-        return deepest;
-    }
-  } else {
-    for (int i = start == -1 ? view->child_count() - 1 : start; i >= 0; --i) {
-      View* deepest = GetFirstFocusableView(view->child_at(i), -1, forward);
-      if (deepest)
-        return deepest;
-    }
-  }
-  return view->IsFocusable() ? view : NULL;
-}
-
-// Returns the first child of |start| that is focusable.
-static View* GetInitialFocusableView(View* start, bool forward) {
-  return GetFirstFocusableView(start, -1, forward);
-}
-
-// Returns the next view after |start_at| that is focusable. Returns NULL if
-// there are no focusable children of |ancestor| after |start_at|.
-static View* GetNextFocusableView(View* ancestor,
-                                  View* start_at,
-                                  bool forward) {
-  DCHECK(ancestor->Contains(start_at));
-  View* parent = start_at;
-  do {
-    View* new_parent = parent->parent();
-    int index = new_parent->GetIndexOf(parent);
-    index += forward ? 1 : -1;
-    if (forward || index != -1) {
-      View* next = GetFirstFocusableView(new_parent, index, forward);
-      if (next)
-        return next;
-    }
-    parent = new_parent;
-  } while (parent != ancestor);
-  return NULL;
-}
-
-// MenuScrollTask --------------------------------------------------------------
-
-// MenuScrollTask is used when the SubmenuView does not all fit on screen and
-// the mouse is over the scroll up/down buttons. MenuScrollTask schedules
-// itself with a RepeatingTimer. When Run is invoked MenuScrollTask scrolls
-// appropriately.
-
-class MenuController::MenuScrollTask {
- public:
-  MenuScrollTask() : submenu_(NULL), is_scrolling_up_(false), start_y_(0) {
-    pixels_per_second_ = MenuItemView::pref_menu_height() * 20;
-  }
-
-  void Update(const MenuController::MenuPart& part) {
-    if (!part.is_scroll()) {
-      StopScrolling();
-      return;
-    }
-    DCHECK(part.submenu);
-    SubmenuView* new_menu = part.submenu;
-    bool new_is_up = (part.type == MenuController::MenuPart::SCROLL_UP);
-    if (new_menu == submenu_ && is_scrolling_up_ == new_is_up)
-      return;
-
-    start_scroll_time_ = base::Time::Now();
-    start_y_ = part.submenu->GetVisibleBounds().y();
-    submenu_ = new_menu;
-    is_scrolling_up_ = new_is_up;
-
-    if (!scrolling_timer_.IsRunning()) {
-      scrolling_timer_.Start(FROM_HERE,
-                             TimeDelta::FromMilliseconds(kScrollTimerMS),
-                             this, &MenuScrollTask::Run);
-    }
-  }
-
-  void StopScrolling() {
-    if (scrolling_timer_.IsRunning()) {
-      scrolling_timer_.Stop();
-      submenu_ = NULL;
-    }
-  }
-
-  // The menu being scrolled. Returns null if not scrolling.
-  SubmenuView* submenu() const { return submenu_; }
-
- private:
-  void Run() {
-    DCHECK(submenu_);
-    gfx::Rect vis_rect = submenu_->GetVisibleBounds();
-    const int delta_y = static_cast<int>(
-        (base::Time::Now() - start_scroll_time_).InMilliseconds() *
-        pixels_per_second_ / 1000);
-    vis_rect.set_y(is_scrolling_up_ ?
-        std::max(0, start_y_ - delta_y) :
-        std::min(submenu_->height() - vis_rect.height(), start_y_ + delta_y));
-    submenu_->ScrollRectToVisible(vis_rect);
-  }
-
-  // SubmenuView being scrolled.
-  SubmenuView* submenu_;
-
-  // Direction scrolling.
-  bool is_scrolling_up_;
-
-  // Timer to periodically scroll.
-  base::RepeatingTimer<MenuScrollTask> scrolling_timer_;
-
-  // Time we started scrolling at.
-  base::Time start_scroll_time_;
-
-  // How many pixels to scroll per second.
-  int pixels_per_second_;
-
-  // Y-coordinate of submenu_view_ when scrolling started.
-  int start_y_;
-
-  DISALLOW_COPY_AND_ASSIGN(MenuScrollTask);
-};
-
-// MenuController:SelectByCharDetails ----------------------------------------
-
-struct MenuController::SelectByCharDetails {
-  SelectByCharDetails()
-      : first_match(-1),
-        has_multiple(false),
-        index_of_item(-1),
-        next_match(-1) {
-  }
-
-  // Index of the first menu with the specified mnemonic.
-  int first_match;
-
-  // If true there are multiple menu items with the same mnemonic.
-  bool has_multiple;
-
-  // Index of the selected item; may remain -1.
-  int index_of_item;
-
-  // If there are multiple matches this is the index of the item after the
-  // currently selected item whose mnemonic matches. This may remain -1 even
-  // though there are matches.
-  int next_match;
-};
-
-// MenuController:State ------------------------------------------------------
-
-MenuController::State::State()
-    : item(NULL),
-      submenu_open(false),
-      anchor(MENU_ANCHOR_TOPLEFT),
-      context_menu(false) {
-}
-
-MenuController::State::~State() {}
-
-// MenuController ------------------------------------------------------------
-
-// static
-MenuController* MenuController::active_instance_ = NULL;
-
-// static
-MenuController* MenuController::GetActiveInstance() {
-  return active_instance_;
-}
-
-MenuItemView* MenuController::Run(Widget* parent,
-                                  MenuButton* button,
-                                  MenuItemView* root,
-                                  const gfx::Rect& bounds,
-                                  MenuAnchorPosition position,
-                                  bool context_menu,
-                                  bool is_nested_drag,
-                                  int* result_event_flags) {
-  exit_type_ = EXIT_NONE;
-  possible_drag_ = false;
-  drag_in_progress_ = false;
-  did_initiate_drag_ = false;
-  closing_event_time_ = base::TimeDelta();
-  menu_start_time_ = base::TimeTicks::Now();
-  menu_start_mouse_press_loc_ = gfx::Point();
-
-  // If we are shown on mouse press, we will eat the subsequent mouse down and
-  // the parent widget will not be able to reset its state (it might have mouse
-  // capture from the mouse down). So we clear its state here.
-  if (parent) {
-    View* root_view = parent->GetRootView();
-    if (root_view) {
-      root_view->SetMouseHandler(NULL);
-      const ui::Event* event =
-          static_cast<internal::RootView*>(root_view)->current_event();
-      if (event && event->type() == ui::ET_MOUSE_PRESSED) {
-        gfx::Point screen_loc(
-            static_cast<const ui::MouseEvent*>(event)->location());
-        View::ConvertPointToScreen(
-            static_cast<View*>(event->target()), &screen_loc);
-        menu_start_mouse_press_loc_ = screen_loc;
-      }
-    }
-  }
-
-  bool nested_menu = showing_;
-  if (showing_) {
-    // Only support nesting of blocking_run menus, nesting of
-    // blocking/non-blocking shouldn't be needed.
-    DCHECK(blocking_run_);
-
-    // We're already showing, push the current state.
-    menu_stack_.push_back(
-        std::make_pair(state_, make_linked_ptr(pressed_lock_.release())));
-
-    // The context menu should be owned by the same parent.
-    DCHECK_EQ(owner_, parent);
-  } else {
-    showing_ = true;
-  }
-
-  // Reset current state.
-  pending_state_ = State();
-  state_ = State();
-  UpdateInitialLocation(bounds, position, context_menu);
-
-  if (owner_)
-    owner_->RemoveObserver(this);
-  owner_ = parent;
-  if (owner_)
-    owner_->AddObserver(this);
-
-  // Set the selection, which opens the initial menu.
-  SetSelection(root, SELECTION_OPEN_SUBMENU | SELECTION_UPDATE_IMMEDIATELY);
-
-  if (!blocking_run_) {
-    if (!is_nested_drag) {
-      // Start the timer to hide the menu. This is needed as we get no
-      // notification when the drag has finished.
-      StartCancelAllTimer();
-    }
-    return NULL;
-  }
-
-  if (button)
-    pressed_lock_.reset(new MenuButton::PressedLock(button));
-
-  // Make sure Chrome doesn't attempt to shut down while the menu is showing.
-  if (ViewsDelegate::views_delegate)
-    ViewsDelegate::views_delegate->AddRef();
-
-  // We need to turn on nestable tasks as in some situations (pressing alt-f for
-  // one) the menus are run from a task. If we don't do this and are invoked
-  // from a task none of the tasks we schedule are processed and the menu
-  // appears totally broken.
-  message_loop_depth_++;
-  DCHECK_LE(message_loop_depth_, 2);
-  RunMessageLoop(nested_menu);
-  message_loop_depth_--;
-
-  if (ViewsDelegate::views_delegate)
-    ViewsDelegate::views_delegate->ReleaseRef();
-
-  // Close any open menus.
-  SetSelection(NULL, SELECTION_UPDATE_IMMEDIATELY | SELECTION_EXIT);
-
-#if defined(OS_WIN)
-  // On Windows, if we select the menu item by touch and if the window at the
-  // location is another window on the same thread, that window gets a
-  // WM_MOUSEACTIVATE message and ends up activating itself, which is not
-  // correct. We workaround this by setting a property on the window at the
-  // current cursor location. We check for this property in our
-  // WM_MOUSEACTIVATE handler and don't activate the window if the property is
-  // set.
-  if (item_selected_by_touch_) {
-    item_selected_by_touch_ = false;
-    POINT cursor_pos;
-    ::GetCursorPos(&cursor_pos);
-     HWND window = ::WindowFromPoint(cursor_pos);
-     if (::GetWindowThreadProcessId(window, NULL) ==
-                                    ::GetCurrentThreadId()) {
-       ::SetProp(window, ui::kIgnoreTouchMouseActivateForWindow,
-                 reinterpret_cast<HANDLE>(true));
-     }
-  }
-#endif
-
-  linked_ptr<MenuButton::PressedLock> nested_pressed_lock;
-  if (nested_menu) {
-    DCHECK(!menu_stack_.empty());
-    // We're running from within a menu, restore the previous state.
-    // The menus are already showing, so we don't have to show them.
-    state_ = menu_stack_.back().first;
-    pending_state_ = menu_stack_.back().first;
-    nested_pressed_lock = menu_stack_.back().second;
-    menu_stack_.pop_back();
-  } else {
-    showing_ = false;
-    did_capture_ = false;
-  }
-
-  MenuItemView* result = result_;
-  // In case we're nested, reset result_.
-  result_ = NULL;
-
-  if (result_event_flags)
-    *result_event_flags = accept_event_flags_;
-
-  if (exit_type_ == EXIT_OUTERMOST) {
-    SetExitType(EXIT_NONE);
-  } else {
-    if (nested_menu && result) {
-      // We're nested and about to return a value. The caller might enter
-      // another blocking loop. We need to make sure all menus are hidden
-      // before that happens otherwise the menus will stay on screen.
-      CloseAllNestedMenus();
-      SetSelection(NULL, SELECTION_UPDATE_IMMEDIATELY | SELECTION_EXIT);
-
-      // Set exit_all_, which makes sure all nested loops exit immediately.
-      if (exit_type_ != EXIT_DESTROYED)
-        SetExitType(EXIT_ALL);
-    }
-  }
-
-  // Reset our pressed lock to the previous state's, if there was one.
-  // The lock handles the case if the button was destroyed.
-  pressed_lock_.reset(nested_pressed_lock.release());
-
-  return result;
-}
-
-void MenuController::Cancel(ExitType type) {
-  // If the menu has already been destroyed, no further cancellation is
-  // needed.  We especially don't want to set the |exit_type_| to a lesser
-  // value.
-  if (exit_type_ == EXIT_DESTROYED || exit_type_ == type)
-    return;
-
-  if (!showing_) {
-    // This occurs if we're in the process of notifying the delegate for a drop
-    // and the delegate cancels us.
-    return;
-  }
-
-  MenuItemView* selected = state_.item;
-  SetExitType(type);
-
-  SendMouseCaptureLostToActiveView();
-
-  // Hide windows immediately.
-  SetSelection(NULL, SELECTION_UPDATE_IMMEDIATELY | SELECTION_EXIT);
-
-  if (!blocking_run_) {
-    // If we didn't block the caller we need to notify the menu, which
-    // triggers deleting us.
-    DCHECK(selected);
-    showing_ = false;
-    delegate_->DropMenuClosed(
-        internal::MenuControllerDelegate::NOTIFY_DELEGATE,
-        selected->GetRootMenuItem());
-    // WARNING: the call to MenuClosed deletes us.
-    return;
-  }
-}
-
-void MenuController::OnMousePressed(SubmenuView* source,
-                                    const ui::MouseEvent& event) {
-  SetSelectionOnPointerDown(source, event);
-}
-
-void MenuController::OnMouseDragged(SubmenuView* source,
-                                    const ui::MouseEvent& event) {
-  MenuPart part = GetMenuPart(source, event.location());
-  UpdateScrolling(part);
-
-  if (!blocking_run_)
-    return;
-
-  if (possible_drag_) {
-    if (View::ExceededDragThreshold(event.location() - press_pt_))
-      StartDrag(source, press_pt_);
-    return;
-  }
-  MenuItemView* mouse_menu = NULL;
-  if (part.type == MenuPart::MENU_ITEM) {
-    if (!part.menu)
-      part.menu = source->GetMenuItem();
-    else
-      mouse_menu = part.menu;
-    SetSelection(part.menu ? part.menu : state_.item, SELECTION_OPEN_SUBMENU);
-  } else if (part.type == MenuPart::NONE) {
-    ShowSiblingMenu(source, event.location());
-  }
-  UpdateActiveMouseView(source, event, mouse_menu);
-}
-
-void MenuController::OnMouseReleased(SubmenuView* source,
-                                     const ui::MouseEvent& event) {
-  if (!blocking_run_)
-    return;
-
-  DCHECK(state_.item);
-  possible_drag_ = false;
-  DCHECK(blocking_run_);
-  MenuPart part = GetMenuPart(source, event.location());
-  if (event.IsRightMouseButton() && part.type == MenuPart::MENU_ITEM) {
-    MenuItemView* menu = part.menu;
-    // |menu| is NULL means this event is from an empty menu or a separator.
-    // If it is from an empty menu, use parent context menu instead of that.
-    if (menu == NULL &&
-        part.submenu->child_count() == 1 &&
-        part.submenu->child_at(0)->id() == MenuItemView::kEmptyMenuItemViewID) {
-      menu = part.parent;
-    }
-
-    if (menu != NULL && ShowContextMenu(menu, source, event,
-                                        ui::MENU_SOURCE_MOUSE))
-      return;
-  }
-
-  // We can use Ctrl+click or the middle mouse button to recursively open urls
-  // for selected folder menu items. If it's only a left click, show the
-  // contents of the folder.
-  if (!part.is_scroll() && part.menu &&
-      !(part.menu->HasSubmenu() &&
-        (event.flags() & ui::EF_LEFT_MOUSE_BUTTON))) {
-    if (GetActiveMouseView()) {
-      SendMouseReleaseToActiveView(source, event);
-      return;
-    }
-    // If a mouse release was received quickly after showing.
-    base::TimeDelta time_shown = base::TimeTicks::Now() - menu_start_time_;
-    if (time_shown.InMilliseconds() < menu_selection_hold_time_ms) {
-      // And it wasn't far from the mouse press location.
-      gfx::Point screen_loc(event.location());
-      View::ConvertPointToScreen(source->GetScrollViewContainer(), &screen_loc);
-      gfx::Vector2d moved = screen_loc - menu_start_mouse_press_loc_;
-      if (moved.Length() < kMaximumLengthMovedToActivate) {
-        // Ignore the mouse release as it was likely this menu was shown under
-        // the mouse and the action was just a normal click.
-        return;
-      }
-    }
-    if (part.menu->GetDelegate()->ShouldExecuteCommandWithoutClosingMenu(
-            part.menu->GetCommand(), event)) {
-      part.menu->GetDelegate()->ExecuteCommand(part.menu->GetCommand(),
-                                               event.flags());
-      return;
-    }
-    if (!part.menu->NonIconChildViewsCount() &&
-        part.menu->GetDelegate()->IsTriggerableEvent(part.menu, event)) {
-      base::TimeDelta shown_time = base::TimeTicks::Now() - menu_start_time_;
-      if (!state_.context_menu || !View::ShouldShowContextMenuOnMousePress() ||
-          shown_time.InMilliseconds() > menu_selection_hold_time_ms) {
-        Accept(part.menu, event.flags());
-      }
-      return;
-    }
-  } else if (part.type == MenuPart::MENU_ITEM) {
-    // User either clicked on empty space, or a menu that has children.
-    SetSelection(part.menu ? part.menu : state_.item,
-                 SELECTION_OPEN_SUBMENU | SELECTION_UPDATE_IMMEDIATELY);
-  }
-  SendMouseCaptureLostToActiveView();
-}
-
-void MenuController::OnMouseMoved(SubmenuView* source,
-                                  const ui::MouseEvent& event) {
-  HandleMouseLocation(source, event.location());
-}
-
-void MenuController::OnMouseEntered(SubmenuView* source,
-                                    const ui::MouseEvent& event) {
-  // MouseEntered is always followed by a mouse moved, so don't need to
-  // do anything here.
-}
-
-bool MenuController::OnMouseWheel(SubmenuView* source,
-                                  const ui::MouseWheelEvent& event) {
-  MenuPart part = GetMenuPart(source, event.location());
-  return part.submenu && part.submenu->OnMouseWheel(event);
-}
-
-void MenuController::OnGestureEvent(SubmenuView* source,
-                                    ui::GestureEvent* event) {
-  MenuPart part = GetMenuPart(source, event->location());
-  if (event->type() == ui::ET_GESTURE_TAP_DOWN) {
-    SetSelectionOnPointerDown(source, *event);
-    event->StopPropagation();
-  } else if (event->type() == ui::ET_GESTURE_LONG_PRESS) {
-    if (part.type == MenuPart::MENU_ITEM && part.menu) {
-      if (ShowContextMenu(part.menu, source, *event, ui::MENU_SOURCE_TOUCH))
-        event->StopPropagation();
-    }
-  } else if (event->type() == ui::ET_GESTURE_TAP) {
-    if (!part.is_scroll() && part.menu &&
-        !(part.menu->HasSubmenu())) {
-      if (part.menu->GetDelegate()->IsTriggerableEvent(
-          part.menu, *event)) {
-        Accept(part.menu, event->flags());
-        item_selected_by_touch_ = true;
-      }
-      event->StopPropagation();
-    } else if (part.type == MenuPart::MENU_ITEM) {
-      // User either tapped on empty space, or a menu that has children.
-      SetSelection(part.menu ? part.menu : state_.item,
-                   SELECTION_OPEN_SUBMENU | SELECTION_UPDATE_IMMEDIATELY);
-      event->StopPropagation();
-    }
-  } else if (event->type() == ui::ET_GESTURE_TAP_CANCEL &&
-             part.menu &&
-             part.type == MenuPart::MENU_ITEM) {
-    // Move the selection to the parent menu so that the selection in the
-    // current menu is unset. Make sure the submenu remains open by sending the
-    // appropriate SetSelectionTypes flags.
-    SetSelection(part.menu->GetParentMenuItem(),
-        SELECTION_OPEN_SUBMENU | SELECTION_UPDATE_IMMEDIATELY);
-    event->StopPropagation();
-  }
-
-  if (event->stopped_propagation())
-      return;
-
-  if (!part.submenu)
-    return;
-  part.submenu->OnGestureEvent(event);
-}
-
-bool MenuController::GetDropFormats(
-      SubmenuView* source,
-      int* formats,
-      std::set<OSExchangeData::CustomFormat>* custom_formats) {
-  return source->GetMenuItem()->GetDelegate()->GetDropFormats(
-      source->GetMenuItem(), formats, custom_formats);
-}
-
-bool MenuController::AreDropTypesRequired(SubmenuView* source) {
-  return source->GetMenuItem()->GetDelegate()->AreDropTypesRequired(
-      source->GetMenuItem());
-}
-
-bool MenuController::CanDrop(SubmenuView* source, const OSExchangeData& data) {
-  return source->GetMenuItem()->GetDelegate()->CanDrop(source->GetMenuItem(),
-                                                       data);
-}
-
-void MenuController::OnDragEntered(SubmenuView* source,
-                                   const ui::DropTargetEvent& event) {
-  valid_drop_coordinates_ = false;
-}
-
-int MenuController::OnDragUpdated(SubmenuView* source,
-                                  const ui::DropTargetEvent& event) {
-  StopCancelAllTimer();
-
-  gfx::Point screen_loc(event.location());
-  View::ConvertPointToScreen(source, &screen_loc);
-  if (valid_drop_coordinates_ && screen_loc == drop_pt_)
-    return last_drop_operation_;
-  drop_pt_ = screen_loc;
-  valid_drop_coordinates_ = true;
-
-  MenuItemView* menu_item = GetMenuItemAt(source, event.x(), event.y());
-  bool over_empty_menu = false;
-  if (!menu_item) {
-    // See if we're over an empty menu.
-    menu_item = GetEmptyMenuItemAt(source, event.x(), event.y());
-    if (menu_item)
-      over_empty_menu = true;
-  }
-  MenuDelegate::DropPosition drop_position = MenuDelegate::DROP_NONE;
-  int drop_operation = ui::DragDropTypes::DRAG_NONE;
-  if (menu_item) {
-    gfx::Point menu_item_loc(event.location());
-    View::ConvertPointToTarget(source, menu_item, &menu_item_loc);
-    MenuItemView* query_menu_item;
-    if (!over_empty_menu) {
-      int menu_item_height = menu_item->height();
-      if (menu_item->HasSubmenu() &&
-          (menu_item_loc.y() > kDropBetweenPixels &&
-           menu_item_loc.y() < (menu_item_height - kDropBetweenPixels))) {
-        drop_position = MenuDelegate::DROP_ON;
-      } else {
-        drop_position = (menu_item_loc.y() < menu_item_height / 2) ?
-            MenuDelegate::DROP_BEFORE : MenuDelegate::DROP_AFTER;
-      }
-      query_menu_item = menu_item;
-    } else {
-      query_menu_item = menu_item->GetParentMenuItem();
-      drop_position = MenuDelegate::DROP_ON;
-    }
-    drop_operation = menu_item->GetDelegate()->GetDropOperation(
-        query_menu_item, event, &drop_position);
-
-    // If the menu has a submenu, schedule the submenu to open.
-    SetSelection(menu_item, menu_item->HasSubmenu() ? SELECTION_OPEN_SUBMENU :
-                 SELECTION_DEFAULT);
-
-    if (drop_position == MenuDelegate::DROP_NONE ||
-        drop_operation == ui::DragDropTypes::DRAG_NONE)
-      menu_item = NULL;
-  } else {
-    SetSelection(source->GetMenuItem(), SELECTION_OPEN_SUBMENU);
-  }
-  SetDropMenuItem(menu_item, drop_position);
-  last_drop_operation_ = drop_operation;
-  return drop_operation;
-}
-
-void MenuController::OnDragExited(SubmenuView* source) {
-  StartCancelAllTimer();
-
-  if (drop_target_) {
-    StopShowTimer();
-    SetDropMenuItem(NULL, MenuDelegate::DROP_NONE);
-  }
-}
-
-int MenuController::OnPerformDrop(SubmenuView* source,
-                                  const ui::DropTargetEvent& event) {
-  DCHECK(drop_target_);
-  // NOTE: the delegate may delete us after invoking OnPerformDrop, as such
-  // we don't call cancel here.
-
-  MenuItemView* item = state_.item;
-  DCHECK(item);
-
-  MenuItemView* drop_target = drop_target_;
-  MenuDelegate::DropPosition drop_position = drop_position_;
-
-  // Close all menus, including any nested menus.
-  SetSelection(NULL, SELECTION_UPDATE_IMMEDIATELY | SELECTION_EXIT);
-  CloseAllNestedMenus();
-
-  // Set state such that we exit.
-  showing_ = false;
-  SetExitType(EXIT_ALL);
-
-  // If over an empty menu item, drop occurs on the parent.
-  if (drop_target->id() == MenuItemView::kEmptyMenuItemViewID)
-    drop_target = drop_target->GetParentMenuItem();
-
-  if (!IsBlockingRun()) {
-    delegate_->DropMenuClosed(
-        internal::MenuControllerDelegate::DONT_NOTIFY_DELEGATE,
-        item->GetRootMenuItem());
-  }
-
-  // WARNING: the call to MenuClosed deletes us.
-
-  return drop_target->GetDelegate()->OnPerformDrop(
-      drop_target, drop_position, event);
-}
-
-void MenuController::OnDragEnteredScrollButton(SubmenuView* source,
-                                               bool is_up) {
-  MenuPart part;
-  part.type = is_up ? MenuPart::SCROLL_UP : MenuPart::SCROLL_DOWN;
-  part.submenu = source;
-  UpdateScrolling(part);
-
-  // Do this to force the selection to hide.
-  SetDropMenuItem(source->GetMenuItemAt(0), MenuDelegate::DROP_NONE);
-
-  StopCancelAllTimer();
-}
-
-void MenuController::OnDragExitedScrollButton(SubmenuView* source) {
-  StartCancelAllTimer();
-  SetDropMenuItem(NULL, MenuDelegate::DROP_NONE);
-  StopScrolling();
-}
-
-void MenuController::OnDragWillStart() {
-  DCHECK(!drag_in_progress_);
-  drag_in_progress_ = true;
-}
-
-void MenuController::OnDragComplete(bool should_close) {
-  DCHECK(drag_in_progress_);
-  drag_in_progress_ = false;
-  if (showing_ && should_close && GetActiveInstance() == this) {
-    CloseAllNestedMenus();
-    Cancel(EXIT_ALL);
-  }
-}
-
-void MenuController::UpdateSubmenuSelection(SubmenuView* submenu) {
-  if (submenu->IsShowing()) {
-    gfx::Point point = GetScreen()->GetCursorScreenPoint();
-    const SubmenuView* root_submenu =
-        submenu->GetMenuItem()->GetRootMenuItem()->GetSubmenu();
-    View::ConvertPointFromScreen(
-        root_submenu->GetWidget()->GetRootView(), &point);
-    HandleMouseLocation(submenu, point);
-  }
-}
-
-void MenuController::OnWidgetDestroying(Widget* widget) {
-  DCHECK_EQ(owner_, widget);
-  owner_->RemoveObserver(this);
-  owner_ = NULL;
-  message_loop_->ClearOwner();
-}
-
-bool MenuController::IsCancelAllTimerRunningForTest() {
-  return cancel_all_timer_.IsRunning();
-}
-
-// static
-void MenuController::TurnOffMenuSelectionHoldForTest() {
-  menu_selection_hold_time_ms = -1;
-}
-
-void MenuController::SetSelection(MenuItemView* menu_item,
-                                  int selection_types) {
-  size_t paths_differ_at = 0;
-  std::vector<MenuItemView*> current_path;
-  std::vector<MenuItemView*> new_path;
-  BuildPathsAndCalculateDiff(pending_state_.item, menu_item, &current_path,
-                             &new_path, &paths_differ_at);
-
-  size_t current_size = current_path.size();
-  size_t new_size = new_path.size();
-
-  bool pending_item_changed = pending_state_.item != menu_item;
-  if (pending_item_changed && pending_state_.item) {
-    CustomButton* button = GetFirstHotTrackedView(pending_state_.item);
-    if (button)
-      button->SetHotTracked(false);
-  }
-
-  // Notify the old path it isn't selected.
-  MenuDelegate* current_delegate =
-      current_path.empty() ? NULL : current_path.front()->GetDelegate();
-  for (size_t i = paths_differ_at; i < current_size; ++i) {
-    if (current_delegate &&
-        current_path[i]->GetType() == MenuItemView::SUBMENU) {
-      current_delegate->WillHideMenu(current_path[i]);
-    }
-    current_path[i]->SetSelected(false);
-  }
-
-  // Notify the new path it is selected.
-  for (size_t i = paths_differ_at; i < new_size; ++i) {
-    new_path[i]->ScrollRectToVisible(new_path[i]->GetLocalBounds());
-    new_path[i]->SetSelected(true);
-  }
-
-  if (menu_item && menu_item->GetDelegate())
-    menu_item->GetDelegate()->SelectionChanged(menu_item);
-
-  DCHECK(menu_item || (selection_types & SELECTION_EXIT) != 0);
-
-  pending_state_.item = menu_item;
-  pending_state_.submenu_open = (selection_types & SELECTION_OPEN_SUBMENU) != 0;
-
-  // Stop timers.
-  StopCancelAllTimer();
-  // Resets show timer only when pending menu item is changed.
-  if (pending_item_changed)
-    StopShowTimer();
-
-  if (selection_types & SELECTION_UPDATE_IMMEDIATELY)
-    CommitPendingSelection();
-  else if (pending_item_changed)
-    StartShowTimer();
-
-  // Notify an accessibility focus event on all menu items except for the root.
-  if (menu_item &&
-      (MenuDepth(menu_item) != 1 ||
-       menu_item->GetType() != MenuItemView::SUBMENU)) {
-    menu_item->NotifyAccessibilityEvent(
-        ui::AX_EVENT_FOCUS, true);
-  }
-}
-
-void MenuController::SetSelectionOnPointerDown(SubmenuView* source,
-                                               const ui::LocatedEvent& event) {
-  if (!blocking_run_)
-    return;
-
-  DCHECK(!GetActiveMouseView());
-
-  MenuPart part = GetMenuPart(source, event.location());
-  if (part.is_scroll())
-    return;  // Ignore presses on scroll buttons.
-
-  // When this menu is opened through a touch event, a simulated right-click
-  // is sent before the menu appears.  Ignore it.
-  if ((event.flags() & ui::EF_RIGHT_MOUSE_BUTTON) &&
-      (event.flags() & ui::EF_FROM_TOUCH))
-    return;
-
-  if (part.type == MenuPart::NONE ||
-      (part.type == MenuPart::MENU_ITEM && part.menu &&
-       part.menu->GetRootMenuItem() != state_.item->GetRootMenuItem())) {
-    // Remember the time when we repost the event. The owner can then use this
-    // to figure out if this menu was finished with the same click which is
-    // sent to it thereafter. Note that the time stamp front he event cannot be
-    // used since the reposting will set a new timestamp when the event gets
-    // processed. As such it is better to take the current time which will be
-    // closer to the time when it arrives again in the menu handler.
-    closing_event_time_ = ui::EventTimeForNow();
-
-    // Mouse wasn't pressed over any menu, or the active menu, cancel.
-
-#if defined(OS_WIN)
-    // We're going to close and we own the mouse capture. We need to repost the
-    // mouse down, otherwise the window the user clicked on won't get the event.
-    RepostEvent(source, event);
-#endif
-
-    // And close.
-    ExitType exit_type = EXIT_ALL;
-    if (!menu_stack_.empty()) {
-      // We're running nested menus. Only exit all if the mouse wasn't over one
-      // of the menus from the last run.
-      gfx::Point screen_loc(event.location());
-      View::ConvertPointToScreen(source->GetScrollViewContainer(), &screen_loc);
-      MenuPart last_part = GetMenuPartByScreenCoordinateUsingMenu(
-          menu_stack_.back().first.item, screen_loc);
-      if (last_part.type != MenuPart::NONE)
-        exit_type = EXIT_OUTERMOST;
-    }
-    Cancel(exit_type);
-
-#if defined(OS_CHROMEOS)
-    // We're going to exit the menu and want to repost the event so that is
-    // is handled normally after the context menu has exited. We call
-    // RepostEvent after Cancel so that mouse capture has been released so
-    // that finding the event target is unaffected by the current capture.
-    RepostEvent(source, event);
-#endif
-    // Do not repost events for Linux Aura because this behavior is more
-    // consistent with the behavior of other Linux apps.
-    return;
-  }
-
-  // On a press we immediately commit the selection, that way a submenu
-  // pops up immediately rather than after a delay.
-  int selection_types = SELECTION_UPDATE_IMMEDIATELY;
-  if (!part.menu) {
-    part.menu = part.parent;
-    selection_types |= SELECTION_OPEN_SUBMENU;
-  } else {
-    if (part.menu->GetDelegate()->CanDrag(part.menu)) {
-      possible_drag_ = true;
-      press_pt_ = event.location();
-    }
-    if (part.menu->HasSubmenu())
-      selection_types |= SELECTION_OPEN_SUBMENU;
-  }
-  SetSelection(part.menu, selection_types);
-}
-
-void MenuController::StartDrag(SubmenuView* source,
-                               const gfx::Point& location) {
-  MenuItemView* item = state_.item;
-  DCHECK(item);
-  // Points are in the coordinates of the submenu, need to map to that of
-  // the selected item. Additionally source may not be the parent of
-  // the selected item, so need to map to screen first then to item.
-  gfx::Point press_loc(location);
-  View::ConvertPointToScreen(source->GetScrollViewContainer(), &press_loc);
-  View::ConvertPointFromScreen(item, &press_loc);
-  gfx::Point widget_loc(press_loc);
-  View::ConvertPointToWidget(item, &widget_loc);
-  scoped_ptr<gfx::Canvas> canvas(GetCanvasForDragImage(
-      source->GetWidget(), gfx::Size(item->width(), item->height())));
-  item->PaintButton(canvas.get(), MenuItemView::PB_FOR_DRAG);
-
-  OSExchangeData data;
-  item->GetDelegate()->WriteDragData(item, &data);
-  drag_utils::SetDragImageOnDataObject(*canvas,
-                                       press_loc.OffsetFromOrigin(),
-                                       &data);
-  StopScrolling();
-  int drag_ops = item->GetDelegate()->GetDragOperations(item);
-  did_initiate_drag_ = true;
-  // TODO(varunjain): Properly determine and send DRAG_EVENT_SOURCE below.
-  item->GetWidget()->RunShellDrag(NULL, data, widget_loc, drag_ops,
-      ui::DragDropTypes::DRAG_EVENT_SOURCE_MOUSE);
-  did_initiate_drag_ = false;
-}
-
-bool MenuController::OnKeyDown(ui::KeyboardCode key_code) {
-  DCHECK(blocking_run_);
-
-  switch (key_code) {
-    case ui::VKEY_UP:
-      IncrementSelection(-1);
-      break;
-
-    case ui::VKEY_DOWN:
-      IncrementSelection(1);
-      break;
-
-    // Handling of VK_RIGHT and VK_LEFT is different depending on the UI
-    // layout.
-    case ui::VKEY_RIGHT:
-      if (base::i18n::IsRTL())
-        CloseSubmenu();
-      else
-        OpenSubmenuChangeSelectionIfCan();
-      break;
-
-    case ui::VKEY_LEFT:
-      if (base::i18n::IsRTL())
-        OpenSubmenuChangeSelectionIfCan();
-      else
-        CloseSubmenu();
-      break;
-
-    case ui::VKEY_SPACE:
-      if (SendAcceleratorToHotTrackedView() == ACCELERATOR_PROCESSED_EXIT)
-        return false;
-      break;
-
-    case ui::VKEY_F4:
-      if (!is_combobox_)
-        break;
-    // Fallthrough to accept or dismiss combobox menus on F4, like windows.
-    case ui::VKEY_RETURN:
-      if (pending_state_.item) {
-        if (pending_state_.item->HasSubmenu()) {
-          if (key_code == ui::VKEY_F4 &&
-              pending_state_.item->GetSubmenu()->IsShowing())
-            return false;
-          else
-            OpenSubmenuChangeSelectionIfCan();
-        } else {
-          SendAcceleratorResultType result = SendAcceleratorToHotTrackedView();
-          if (result == ACCELERATOR_NOT_PROCESSED &&
-              pending_state_.item->enabled()) {
-            Accept(pending_state_.item, 0);
-            return false;
-          } else if (result == ACCELERATOR_PROCESSED_EXIT) {
-            return false;
-          }
-        }
-      }
-      break;
-
-    case ui::VKEY_ESCAPE:
-      if (!state_.item->GetParentMenuItem() ||
-          (!state_.item->GetParentMenuItem()->GetParentMenuItem() &&
-           (!state_.item->HasSubmenu() ||
-            !state_.item->GetSubmenu()->IsShowing()))) {
-        // User pressed escape and only one menu is shown, cancel it.
-        Cancel(EXIT_OUTERMOST);
-        return false;
-      }
-      CloseSubmenu();
-      break;
-
-    default:
-      break;
-  }
-  return true;
-}
-
-MenuController::MenuController(ui::NativeTheme* theme,
-                               bool blocking,
-                               internal::MenuControllerDelegate* delegate)
-    : blocking_run_(blocking),
-      showing_(false),
-      exit_type_(EXIT_NONE),
-      did_capture_(false),
-      result_(NULL),
-      accept_event_flags_(0),
-      drop_target_(NULL),
-      drop_position_(MenuDelegate::DROP_UNKNOWN),
-      owner_(NULL),
-      possible_drag_(false),
-      drag_in_progress_(false),
-      did_initiate_drag_(false),
-      valid_drop_coordinates_(false),
-      last_drop_operation_(MenuDelegate::DROP_UNKNOWN),
-      showing_submenu_(false),
-      active_mouse_view_id_(ViewStorage::GetInstance()->CreateStorageID()),
-      delegate_(delegate),
-      message_loop_depth_(0),
-      menu_config_(theme),
-      closing_event_time_(base::TimeDelta()),
-      menu_start_time_(base::TimeTicks()),
-      is_combobox_(false),
-      item_selected_by_touch_(false),
-      message_loop_(MenuMessageLoop::Create()) {
-  active_instance_ = this;
-}
-
-MenuController::~MenuController() {
-  DCHECK(!showing_);
-  if (owner_)
-    owner_->RemoveObserver(this);
-  if (active_instance_ == this)
-    active_instance_ = NULL;
-  StopShowTimer();
-  StopCancelAllTimer();
-}
-
-void MenuController::RunMessageLoop(bool nested_menu) {
-  message_loop_->Run(this, owner_, nested_menu);
-}
-
-MenuController::SendAcceleratorResultType
-    MenuController::SendAcceleratorToHotTrackedView() {
-  CustomButton* hot_view = GetFirstHotTrackedView(pending_state_.item);
-  if (!hot_view)
-    return ACCELERATOR_NOT_PROCESSED;
-
-  ui::Accelerator accelerator(ui::VKEY_RETURN, ui::EF_NONE);
-  hot_view->AcceleratorPressed(accelerator);
-  CustomButton* button = static_cast<CustomButton*>(hot_view);
-  button->SetHotTracked(true);
-  return (exit_type_ == EXIT_NONE) ?
-      ACCELERATOR_PROCESSED : ACCELERATOR_PROCESSED_EXIT;
-}
-
-void MenuController::UpdateInitialLocation(const gfx::Rect& bounds,
-                                           MenuAnchorPosition position,
-                                           bool context_menu) {
-  pending_state_.context_menu = context_menu;
-  pending_state_.initial_bounds = bounds;
-  if (bounds.height() > 1) {
-    // Inset the bounds slightly, otherwise drag coordinates don't line up
-    // nicely and menus close prematurely.
-    pending_state_.initial_bounds.Inset(0, 1);
-  }
-
-  // Reverse anchor position for RTL languages.
-  if (base::i18n::IsRTL() &&
-      (position == MENU_ANCHOR_TOPRIGHT || position == MENU_ANCHOR_TOPLEFT)) {
-    pending_state_.anchor = position == MENU_ANCHOR_TOPRIGHT
-                                ? MENU_ANCHOR_TOPLEFT
-                                : MENU_ANCHOR_TOPRIGHT;
-  } else {
-    pending_state_.anchor = position;
-  }
-
-  // Calculate the bounds of the monitor we'll show menus on. Do this once to
-  // avoid repeated system queries for the info.
-  pending_state_.monitor_bounds = GetScreen()->GetDisplayNearestPoint(
-      bounds.origin()).work_area();
-
-  if (!pending_state_.monitor_bounds.Contains(bounds)) {
-    // Use the monitor area if the work area doesn't contain the bounds. This
-    // handles showing a menu from the launcher.
-    gfx::Rect monitor_area = GetScreen()->GetDisplayNearestPoint(
-        bounds.origin()).bounds();
-    if (monitor_area.Contains(bounds))
-      pending_state_.monitor_bounds = monitor_area;
-  }
-}
-
-void MenuController::Accept(MenuItemView* item, int event_flags) {
-  DCHECK(IsBlockingRun());
-  result_ = item;
-  if (item && !menu_stack_.empty() &&
-      !item->GetDelegate()->ShouldCloseAllMenusOnExecute(item->GetCommand())) {
-    SetExitType(EXIT_OUTERMOST);
-  } else {
-    SetExitType(EXIT_ALL);
-  }
-  accept_event_flags_ = event_flags;
-}
-
-bool MenuController::ShowSiblingMenu(SubmenuView* source,
-                                     const gfx::Point& mouse_location) {
-  if (!menu_stack_.empty() || !pressed_lock_.get())
-    return false;
-
-  View* source_view = source->GetScrollViewContainer();
-  if (mouse_location.x() >= 0 &&
-      mouse_location.x() < source_view->width() &&
-      mouse_location.y() >= 0 &&
-      mouse_location.y() < source_view->height()) {
-    // The mouse is over the menu, no need to continue.
-    return false;
-  }
-
-  gfx::NativeWindow window_under_mouse = GetScreen()->GetWindowUnderCursor();
-  // TODO(oshima): Replace with views only API.
-  if (!owner_ || window_under_mouse != owner_->GetNativeWindow())
-    return false;
-
-  // The user moved the mouse outside the menu and over the owning window. See
-  // if there is a sibling menu we should show.
-  gfx::Point screen_point(mouse_location);
-  View::ConvertPointToScreen(source_view, &screen_point);
-  MenuAnchorPosition anchor;
-  bool has_mnemonics;
-  MenuButton* button = NULL;
-  MenuItemView* alt_menu = source->GetMenuItem()->GetDelegate()->
-      GetSiblingMenu(source->GetMenuItem()->GetRootMenuItem(),
-                     screen_point, &anchor, &has_mnemonics, &button);
-  if (!alt_menu || (state_.item && state_.item->GetRootMenuItem() == alt_menu))
-    return false;
-
-  delegate_->SiblingMenuCreated(alt_menu);
-
-  if (!button) {
-    // If the delegate returns a menu, they must also return a button.
-    NOTREACHED();
-    return false;
-  }
-
-  // There is a sibling menu, update the button state, hide the current menu
-  // and show the new one.
-  pressed_lock_.reset(new MenuButton::PressedLock(button));
-
-  // Need to reset capture when we show the menu again, otherwise we aren't
-  // going to get any events.
-  did_capture_ = false;
-  gfx::Point screen_menu_loc;
-  View::ConvertPointToScreen(button, &screen_menu_loc);
-
-  // It is currently not possible to show a submenu recursively in a bubble.
-  DCHECK(!MenuItemView::IsBubble(anchor));
-  // Subtract 1 from the height to make the popup flush with the button border.
-  UpdateInitialLocation(gfx::Rect(screen_menu_loc.x(), screen_menu_loc.y(),
-                                  button->width(), button->height() - 1),
-                        anchor, state_.context_menu);
-  alt_menu->PrepareForRun(
-      false, has_mnemonics,
-      source->GetMenuItem()->GetRootMenuItem()->show_mnemonics_);
-  alt_menu->controller_ = this;
-  SetSelection(alt_menu, SELECTION_OPEN_SUBMENU | SELECTION_UPDATE_IMMEDIATELY);
-  return true;
-}
-
-bool MenuController::ShowContextMenu(MenuItemView* menu_item,
-                                     SubmenuView* source,
-                                     const ui::LocatedEvent& event,
-                                     ui::MenuSourceType source_type) {
-  // Set the selection immediately, making sure the submenu is only open
-  // if it already was.
-  int selection_types = SELECTION_UPDATE_IMMEDIATELY;
-  if (state_.item == pending_state_.item && state_.submenu_open)
-    selection_types |= SELECTION_OPEN_SUBMENU;
-  SetSelection(pending_state_.item, selection_types);
-  gfx::Point loc(event.location());
-  View::ConvertPointToScreen(source->GetScrollViewContainer(), &loc);
-
-  if (menu_item->GetDelegate()->ShowContextMenu(
-          menu_item, menu_item->GetCommand(), loc, source_type)) {
-    SendMouseCaptureLostToActiveView();
-    return true;
-  }
-  return false;
-}
-
-void MenuController::CloseAllNestedMenus() {
-  for (std::list<NestedState>::iterator i = menu_stack_.begin();
-       i != menu_stack_.end(); ++i) {
-    State& state = i->first;
-    MenuItemView* last_item = state.item;
-    for (MenuItemView* item = last_item; item;
-         item = item->GetParentMenuItem()) {
-      CloseMenu(item);
-      last_item = item;
-    }
-    state.submenu_open = false;
-    state.item = last_item;
-  }
-}
-
-MenuItemView* MenuController::GetMenuItemAt(View* source, int x, int y) {
-  // Walk the view hierarchy until we find a menu item (or the root).
-  View* child_under_mouse = source->GetEventHandlerForPoint(gfx::Point(x, y));
-  while (child_under_mouse &&
-         child_under_mouse->id() != MenuItemView::kMenuItemViewID) {
-    child_under_mouse = child_under_mouse->parent();
-  }
-  if (child_under_mouse && child_under_mouse->enabled() &&
-      child_under_mouse->id() == MenuItemView::kMenuItemViewID) {
-    return static_cast<MenuItemView*>(child_under_mouse);
-  }
-  return NULL;
-}
-
-MenuItemView* MenuController::GetEmptyMenuItemAt(View* source, int x, int y) {
-  View* child_under_mouse = source->GetEventHandlerForPoint(gfx::Point(x, y));
-  if (child_under_mouse &&
-      child_under_mouse->id() == MenuItemView::kEmptyMenuItemViewID) {
-    return static_cast<MenuItemView*>(child_under_mouse);
-  }
-  return NULL;
-}
-
-bool MenuController::IsScrollButtonAt(SubmenuView* source,
-                                      int x,
-                                      int y,
-                                      MenuPart::Type* part) {
-  MenuScrollViewContainer* scroll_view = source->GetScrollViewContainer();
-  View* child_under_mouse =
-      scroll_view->GetEventHandlerForPoint(gfx::Point(x, y));
-  if (child_under_mouse && child_under_mouse->enabled()) {
-    if (child_under_mouse == scroll_view->scroll_up_button()) {
-      *part = MenuPart::SCROLL_UP;
-      return true;
-    }
-    if (child_under_mouse == scroll_view->scroll_down_button()) {
-      *part = MenuPart::SCROLL_DOWN;
-      return true;
-    }
-  }
-  return false;
-}
-
-MenuController::MenuPart MenuController::GetMenuPart(
-    SubmenuView* source,
-    const gfx::Point& source_loc) {
-  gfx::Point screen_loc(source_loc);
-  View::ConvertPointToScreen(source->GetScrollViewContainer(), &screen_loc);
-  return GetMenuPartByScreenCoordinateUsingMenu(state_.item, screen_loc);
-}
-
-MenuController::MenuPart MenuController::GetMenuPartByScreenCoordinateUsingMenu(
-    MenuItemView* item,
-    const gfx::Point& screen_loc) {
-  MenuPart part;
-  for (; item; item = item->GetParentMenuItem()) {
-    if (item->HasSubmenu() && item->GetSubmenu()->IsShowing() &&
-        GetMenuPartByScreenCoordinateImpl(item->GetSubmenu(), screen_loc,
-                                          &part)) {
-      return part;
-    }
-  }
-  return part;
-}
-
-bool MenuController::GetMenuPartByScreenCoordinateImpl(
-    SubmenuView* menu,
-    const gfx::Point& screen_loc,
-    MenuPart* part) {
-  // Is the mouse over the scroll buttons?
-  gfx::Point scroll_view_loc = screen_loc;
-  View* scroll_view_container = menu->GetScrollViewContainer();
-  View::ConvertPointFromScreen(scroll_view_container, &scroll_view_loc);
-  if (scroll_view_loc.x() < 0 ||
-      scroll_view_loc.x() >= scroll_view_container->width() ||
-      scroll_view_loc.y() < 0 ||
-      scroll_view_loc.y() >= scroll_view_container->height()) {
-    // Point isn't contained in menu.
-    return false;
-  }
-  if (IsScrollButtonAt(menu, scroll_view_loc.x(), scroll_view_loc.y(),
-                       &(part->type))) {
-    part->submenu = menu;
-    return true;
-  }
-
-  // Not over the scroll button. Check the actual menu.
-  if (DoesSubmenuContainLocation(menu, screen_loc)) {
-    gfx::Point menu_loc = screen_loc;
-    View::ConvertPointFromScreen(menu, &menu_loc);
-    part->menu = GetMenuItemAt(menu, menu_loc.x(), menu_loc.y());
-    part->type = MenuPart::MENU_ITEM;
-    part->submenu = menu;
-    if (!part->menu)
-      part->parent = menu->GetMenuItem();
-    return true;
-  }
-
-  // While the mouse isn't over a menu item or the scroll buttons of menu, it
-  // is contained by menu and so we return true. If we didn't return true other
-  // menus would be searched, even though they are likely obscured by us.
-  return true;
-}
-
-bool MenuController::DoesSubmenuContainLocation(SubmenuView* submenu,
-                                                const gfx::Point& screen_loc) {
-  gfx::Point view_loc = screen_loc;
-  View::ConvertPointFromScreen(submenu, &view_loc);
-  gfx::Rect vis_rect = submenu->GetVisibleBounds();
-  return vis_rect.Contains(view_loc.x(), view_loc.y());
-}
-
-void MenuController::CommitPendingSelection() {
-  StopShowTimer();
-
-  size_t paths_differ_at = 0;
-  std::vector<MenuItemView*> current_path;
-  std::vector<MenuItemView*> new_path;
-  BuildPathsAndCalculateDiff(state_.item, pending_state_.item, &current_path,
-                             &new_path, &paths_differ_at);
-
-  // Hide the old menu.
-  for (size_t i = paths_differ_at; i < current_path.size(); ++i) {
-    if (current_path[i]->HasSubmenu()) {
-      current_path[i]->GetSubmenu()->Hide();
-    }
-  }
-
-  // Copy pending to state_, making sure to preserve the direction menus were
-  // opened.
-  std::list<bool> pending_open_direction;
-  state_.open_leading.swap(pending_open_direction);
-  state_ = pending_state_;
-  state_.open_leading.swap(pending_open_direction);
-
-  int menu_depth = MenuDepth(state_.item);
-  if (menu_depth == 0) {
-    state_.open_leading.clear();
-  } else {
-    int cached_size = static_cast<int>(state_.open_leading.size());
-    DCHECK_GE(menu_depth, 0);
-    while (cached_size-- >= menu_depth)
-      state_.open_leading.pop_back();
-  }
-
-  if (!state_.item) {
-    // Nothing to select.
-    StopScrolling();
-    return;
-  }
-
-  // Open all the submenus preceeding the last menu item (last menu item is
-  // handled next).
-  if (new_path.size() > 1) {
-    for (std::vector<MenuItemView*>::iterator i = new_path.begin();
-         i != new_path.end() - 1; ++i) {
-      OpenMenu(*i);
-    }
-  }
-
-  if (state_.submenu_open) {
-    // The submenu should be open, open the submenu if the item has a submenu.
-    if (state_.item->HasSubmenu()) {
-      OpenMenu(state_.item);
-    } else {
-      state_.submenu_open = false;
-    }
-  } else if (state_.item->HasSubmenu() &&
-             state_.item->GetSubmenu()->IsShowing()) {
-    state_.item->GetSubmenu()->Hide();
-  }
-
-  if (scroll_task_.get() && scroll_task_->submenu()) {
-    // Stop the scrolling if none of the elements of the selection contain
-    // the menu being scrolled.
-    bool found = false;
-    for (MenuItemView* item = state_.item; item && !found;
-         item = item->GetParentMenuItem()) {
-      found = (item->HasSubmenu() && item->GetSubmenu()->IsShowing() &&
-               item->GetSubmenu() == scroll_task_->submenu());
-    }
-    if (!found)
-      StopScrolling();
-  }
-}
-
-void MenuController::CloseMenu(MenuItemView* item) {
-  DCHECK(item);
-  if (!item->HasSubmenu())
-    return;
-  item->GetSubmenu()->Hide();
-}
-
-void MenuController::OpenMenu(MenuItemView* item) {
-  DCHECK(item);
-  if (item->GetSubmenu()->IsShowing()) {
-    return;
-  }
-
-  OpenMenuImpl(item, true);
-  did_capture_ = true;
-}
-
-void MenuController::OpenMenuImpl(MenuItemView* item, bool show) {
-  // TODO(oshima|sky): Don't show the menu if drag is in progress and
-  // this menu doesn't support drag drop. See crbug.com/110495.
-  if (show) {
-    int old_count = item->GetSubmenu()->child_count();
-    item->GetDelegate()->WillShowMenu(item);
-    if (old_count != item->GetSubmenu()->child_count()) {
-      // If the number of children changed then we may need to add empty items.
-      item->AddEmptyMenus();
-    }
-  }
-  bool prefer_leading =
-      state_.open_leading.empty() ? true : state_.open_leading.back();
-  bool resulting_direction;
-  gfx::Rect bounds = MenuItemView::IsBubble(state_.anchor) ?
-      CalculateBubbleMenuBounds(item, prefer_leading, &resulting_direction) :
-      CalculateMenuBounds(item, prefer_leading, &resulting_direction);
-  state_.open_leading.push_back(resulting_direction);
-  bool do_capture = (!did_capture_ && blocking_run_);
-  showing_submenu_ = true;
-  if (show) {
-    // Menus are the only place using kGroupingPropertyKey, so any value (other
-    // than 0) is fine.
-    const int kGroupingId = 1001;
-    item->GetSubmenu()->ShowAt(owner_, bounds, do_capture);
-    item->GetSubmenu()->GetWidget()->SetNativeWindowProperty(
-        TooltipManager::kGroupingPropertyKey,
-        reinterpret_cast<void*>(kGroupingId));
-  } else {
-    item->GetSubmenu()->Reposition(bounds);
-  }
-  showing_submenu_ = false;
-}
-
-void MenuController::MenuChildrenChanged(MenuItemView* item) {
-  DCHECK(item);
-  // Menu shouldn't be updated during drag operation.
-  DCHECK(!GetActiveMouseView());
-
-  // If the current item or pending item is a descendant of the item
-  // that changed, move the selection back to the changed item.
-  const MenuItemView* ancestor = state_.item;
-  while (ancestor && ancestor != item)
-    ancestor = ancestor->GetParentMenuItem();
-  if (!ancestor) {
-    ancestor = pending_state_.item;
-    while (ancestor && ancestor != item)
-      ancestor = ancestor->GetParentMenuItem();
-    if (!ancestor)
-      return;
-  }
-  SetSelection(item, SELECTION_OPEN_SUBMENU | SELECTION_UPDATE_IMMEDIATELY);
-  if (item->HasSubmenu())
-    OpenMenuImpl(item, false);
-}
-
-void MenuController::BuildPathsAndCalculateDiff(
-    MenuItemView* old_item,
-    MenuItemView* new_item,
-    std::vector<MenuItemView*>* old_path,
-    std::vector<MenuItemView*>* new_path,
-    size_t* first_diff_at) {
-  DCHECK(old_path && new_path && first_diff_at);
-  BuildMenuItemPath(old_item, old_path);
-  BuildMenuItemPath(new_item, new_path);
-
-  size_t common_size = std::min(old_path->size(), new_path->size());
-
-  // Find the first difference between the two paths, when the loop
-  // returns, diff_i is the first index where the two paths differ.
-  for (size_t i = 0; i < common_size; ++i) {
-    if ((*old_path)[i] != (*new_path)[i]) {
-      *first_diff_at = i;
-      return;
-    }
-  }
-
-  *first_diff_at = common_size;
-}
-
-void MenuController::BuildMenuItemPath(MenuItemView* item,
-                                       std::vector<MenuItemView*>* path) {
-  if (!item)
-    return;
-  BuildMenuItemPath(item->GetParentMenuItem(), path);
-  path->push_back(item);
-}
-
-void MenuController::StartShowTimer() {
-  show_timer_.Start(FROM_HERE,
-                    TimeDelta::FromMilliseconds(menu_config_.show_delay),
-                    this, &MenuController::CommitPendingSelection);
-}
-
-void MenuController::StopShowTimer() {
-  show_timer_.Stop();
-}
-
-void MenuController::StartCancelAllTimer() {
-  cancel_all_timer_.Start(FROM_HERE,
-                          TimeDelta::FromMilliseconds(kCloseOnExitTime),
-                          this, &MenuController::CancelAll);
-}
-
-void MenuController::StopCancelAllTimer() {
-  cancel_all_timer_.Stop();
-}
-
-gfx::Rect MenuController::CalculateMenuBounds(MenuItemView* item,
-                                              bool prefer_leading,
-                                              bool* is_leading) {
-  DCHECK(item);
-
-  SubmenuView* submenu = item->GetSubmenu();
-  DCHECK(submenu);
-
-  gfx::Size pref = submenu->GetScrollViewContainer()->GetPreferredSize();
-
-  // Don't let the menu go too wide.
-  pref.set_width(std::min(pref.width(),
-                            item->GetDelegate()->GetMaxWidthForMenu(item)));
-  if (!state_.monitor_bounds.IsEmpty())
-    pref.set_width(std::min(pref.width(), state_.monitor_bounds.width()));
-
-  // Assume we can honor prefer_leading.
-  *is_leading = prefer_leading;
-
-  int x, y;
-
-  const MenuConfig& menu_config = item->GetMenuConfig();
-
-  if (!item->GetParentMenuItem()) {
-    // First item, position relative to initial location.
-    x = state_.initial_bounds.x();
-
-    // Offsets for context menu prevent menu items being selected by
-    // simply opening the menu (bug 142992).
-    if (menu_config.offset_context_menus && state_.context_menu)
-      x += 1;
-
-    y = state_.initial_bounds.bottom();
-    if (state_.anchor == MENU_ANCHOR_TOPRIGHT) {
-      x = x + state_.initial_bounds.width() - pref.width();
-      if (menu_config.offset_context_menus && state_.context_menu)
-        x -= 1;
-    } else if (state_.anchor == MENU_ANCHOR_BOTTOMCENTER) {
-      x = x - (pref.width() - state_.initial_bounds.width()) / 2;
-      if (pref.height() >
-          state_.initial_bounds.y() + kCenteredContextMenuYOffset) {
-        // Menu does not fit above the anchor. We move it to below.
-        y = state_.initial_bounds.y() - kCenteredContextMenuYOffset;
-      } else {
-        y = std::max(0, state_.initial_bounds.y() - pref.height()) +
-            kCenteredContextMenuYOffset;
-      }
-    }
-
-    if (!state_.monitor_bounds.IsEmpty() &&
-        y + pref.height() > state_.monitor_bounds.bottom()) {
-      // The menu doesn't fit fully below the button on the screen. The menu
-      // position with respect to the bounds will be preserved if it has
-      // already been drawn. When the requested positioning is below the bounds
-      // it will shrink the menu to make it fit below.
-      // If the requested positioning is best fit, it will first try to fit the
-      // menu below. If that does not fit it will try to place it above. If
-      // that will not fit it will place it at the bottom of the work area and
-      // moving it off the initial_bounds region to avoid overlap.
-      // In all other requested position styles it will be flipped above and
-      // the height will be shrunken to the usable height.
-      if (item->actual_menu_position() == MenuItemView::POSITION_BELOW_BOUNDS) {
-        pref.set_height(std::min(pref.height(),
-                                 state_.monitor_bounds.bottom() - y));
-      } else if (item->actual_menu_position() ==
-                 MenuItemView::POSITION_BEST_FIT) {
-        MenuItemView::MenuPosition orientation =
-            MenuItemView::POSITION_BELOW_BOUNDS;
-        if (state_.monitor_bounds.height() < pref.height()) {
-          // Handle very tall menus.
-          pref.set_height(state_.monitor_bounds.height());
-          y = state_.monitor_bounds.y();
-        } else if (state_.monitor_bounds.y() + pref.height() <
-            state_.initial_bounds.y()) {
-          // Flipping upwards if there is enough space.
-          y = state_.initial_bounds.y() - pref.height();
-          orientation = MenuItemView::POSITION_ABOVE_BOUNDS;
-        } else {
-          // It is allowed to move the menu a bit around in order to get the
-          // best fit and to avoid showing scroll elements.
-          y = state_.monitor_bounds.bottom() - pref.height();
-        }
-        if (orientation == MenuItemView::POSITION_BELOW_BOUNDS) {
-          // The menu should never overlap the owning button. So move it.
-          // We use the anchor view style to determine the preferred position
-          // relative to the owning button.
-          if (state_.anchor == MENU_ANCHOR_TOPLEFT) {
-            // The menu starts with the same x coordinate as the owning button.
-            if (x + state_.initial_bounds.width() + pref.width() >
-                state_.monitor_bounds.right())
-              x -= pref.width();  // Move the menu to the left of the button.
-            else
-              x += state_.initial_bounds.width(); // Move the menu right.
-          } else {
-            // The menu should end with the same x coordinate as the owning
-            // button.
-            if (state_.monitor_bounds.x() >
-                state_.initial_bounds.x() - pref.width())
-              x = state_.initial_bounds.right();  // Move right of the button.
-            else
-              x = state_.initial_bounds.x() - pref.width(); // Move left.
-          }
-        }
-        item->set_actual_menu_position(orientation);
-      } else {
-        pref.set_height(std::min(pref.height(),
-            state_.initial_bounds.y() - state_.monitor_bounds.y()));
-        y = state_.initial_bounds.y() - pref.height();
-        item->set_actual_menu_position(MenuItemView::POSITION_ABOVE_BOUNDS);
-      }
-    } else if (item->actual_menu_position() ==
-               MenuItemView::POSITION_ABOVE_BOUNDS) {
-      pref.set_height(std::min(pref.height(),
-          state_.initial_bounds.y() - state_.monitor_bounds.y()));
-      y = state_.initial_bounds.y() - pref.height();
-    } else {
-      item->set_actual_menu_position(MenuItemView::POSITION_BELOW_BOUNDS);
-    }
-    if (state_.monitor_bounds.width() != 0 &&
-        menu_config.offset_context_menus && state_.context_menu) {
-      if (x + pref.width() > state_.monitor_bounds.right())
-        x = state_.initial_bounds.x() - pref.width() - 1;
-      if (x < state_.monitor_bounds.x())
-        x = state_.monitor_bounds.x();
-    }
-  } else {
-    // Not the first menu; position it relative to the bounds of the menu
-    // item.
-    gfx::Point item_loc;
-    View::ConvertPointToScreen(item, &item_loc);
-
-    // We must make sure we take into account the UI layout. If the layout is
-    // RTL, then a 'leading' menu is positioned to the left of the parent menu
-    // item and not to the right.
-    bool layout_is_rtl = base::i18n::IsRTL();
-    bool create_on_the_right = (prefer_leading && !layout_is_rtl) ||
-                               (!prefer_leading && layout_is_rtl);
-    int submenu_horizontal_inset = menu_config.submenu_horizontal_inset;
-
-    if (create_on_the_right) {
-      x = item_loc.x() + item->width() - submenu_horizontal_inset;
-      if (state_.monitor_bounds.width() != 0 &&
-          x + pref.width() > state_.monitor_bounds.right()) {
-        if (layout_is_rtl)
-          *is_leading = true;
-        else
-          *is_leading = false;
-        x = item_loc.x() - pref.width() + submenu_horizontal_inset;
-      }
-    } else {
-      x = item_loc.x() - pref.width() + submenu_horizontal_inset;
-      if (state_.monitor_bounds.width() != 0 && x < state_.monitor_bounds.x()) {
-        if (layout_is_rtl)
-          *is_leading = false;
-        else
-          *is_leading = true;
-        x = item_loc.x() + item->width() - submenu_horizontal_inset;
-      }
-    }
-    y = item_loc.y() - menu_config.menu_vertical_border_size;
-    if (state_.monitor_bounds.width() != 0) {
-      pref.set_height(std::min(pref.height(), state_.monitor_bounds.height()));
-      if (y + pref.height() > state_.monitor_bounds.bottom())
-        y = state_.monitor_bounds.bottom() - pref.height();
-      if (y < state_.monitor_bounds.y())
-        y = state_.monitor_bounds.y();
-    }
-  }
-
-  if (state_.monitor_bounds.width() != 0) {
-    if (x + pref.width() > state_.monitor_bounds.right())
-      x = state_.monitor_bounds.right() - pref.width();
-    if (x < state_.monitor_bounds.x())
-      x = state_.monitor_bounds.x();
-  }
-  return gfx::Rect(x, y, pref.width(), pref.height());
-}
-
-gfx::Rect MenuController::CalculateBubbleMenuBounds(MenuItemView* item,
-                                                    bool prefer_leading,
-                                                    bool* is_leading) {
-  DCHECK(item);
-  DCHECK(!item->GetParentMenuItem());
-
-  // Assume we can honor prefer_leading.
-  *is_leading = prefer_leading;
-
-  SubmenuView* submenu = item->GetSubmenu();
-  DCHECK(submenu);
-
-  gfx::Size pref = submenu->GetScrollViewContainer()->GetPreferredSize();
-  const gfx::Rect& owner_bounds = pending_state_.initial_bounds;
-
-  // First the size gets reduced to the possible space.
-  if (!state_.monitor_bounds.IsEmpty()) {
-    int max_width = state_.monitor_bounds.width();
-    int max_height = state_.monitor_bounds.height();
-    // In case of bubbles, the maximum width is limited by the space
-    // between the display corner and the target area + the tip size.
-    if (state_.anchor == MENU_ANCHOR_BUBBLE_LEFT) {
-      max_width = owner_bounds.x() - state_.monitor_bounds.x() +
-                  kBubbleTipSizeLeftRight;
-    } else if (state_.anchor == MENU_ANCHOR_BUBBLE_RIGHT) {
-      max_width = state_.monitor_bounds.right() - owner_bounds.right() +
-                  kBubbleTipSizeLeftRight;
-    } else if (state_.anchor == MENU_ANCHOR_BUBBLE_ABOVE) {
-      max_height = owner_bounds.y() - state_.monitor_bounds.y() +
-                   kBubbleTipSizeTopBottom;
-    } else if (state_.anchor == MENU_ANCHOR_BUBBLE_BELOW) {
-      max_height = state_.monitor_bounds.bottom() - owner_bounds.bottom() +
-                   kBubbleTipSizeTopBottom;
-    }
-    // The space for the menu to cover should never get empty.
-    DCHECK_GE(max_width, kBubbleTipSizeLeftRight);
-    DCHECK_GE(max_height, kBubbleTipSizeTopBottom);
-    pref.set_width(std::min(pref.width(), max_width));
-    pref.set_height(std::min(pref.height(), max_height));
-  }
-  // Also make sure that the menu does not go too wide.
-  pref.set_width(std::min(pref.width(),
-                          item->GetDelegate()->GetMaxWidthForMenu(item)));
-
-  int x, y;
-  if (state_.anchor == MENU_ANCHOR_BUBBLE_ABOVE ||
-      state_.anchor == MENU_ANCHOR_BUBBLE_BELOW) {
-    if (state_.anchor == MENU_ANCHOR_BUBBLE_ABOVE)
-      y = owner_bounds.y() - pref.height() + kBubbleTipSizeTopBottom;
-    else
-      y = owner_bounds.bottom() - kBubbleTipSizeTopBottom;
-
-    x = owner_bounds.CenterPoint().x() - pref.width() / 2;
-    int x_old = x;
-    if (x < state_.monitor_bounds.x()) {
-      x = state_.monitor_bounds.x();
-    } else if (x + pref.width() > state_.monitor_bounds.right()) {
-      x = state_.monitor_bounds.right() - pref.width();
-    }
-    submenu->GetScrollViewContainer()->SetBubbleArrowOffset(
-        pref.width() / 2 - x + x_old);
-  } else {
-    if (state_.anchor == MENU_ANCHOR_BUBBLE_RIGHT)
-      x = owner_bounds.right() - kBubbleTipSizeLeftRight;
-    else
-      x = owner_bounds.x() - pref.width() + kBubbleTipSizeLeftRight;
-
-    y = owner_bounds.CenterPoint().y() - pref.height() / 2;
-    int y_old = y;
-    if (y < state_.monitor_bounds.y()) {
-      y = state_.monitor_bounds.y();
-    } else if (y + pref.height() > state_.monitor_bounds.bottom()) {
-      y = state_.monitor_bounds.bottom() - pref.height();
-    }
-    submenu->GetScrollViewContainer()->SetBubbleArrowOffset(
-        pref.height() / 2 - y + y_old);
-  }
-  return gfx::Rect(x, y, pref.width(), pref.height());
-}
-
-// static
-int MenuController::MenuDepth(MenuItemView* item) {
-  return item ? (MenuDepth(item->GetParentMenuItem()) + 1) : 0;
-}
-
-void MenuController::IncrementSelection(int delta) {
-  MenuItemView* item = pending_state_.item;
-  DCHECK(item);
-  if (pending_state_.submenu_open && item->HasSubmenu() &&
-      item->GetSubmenu()->IsShowing()) {
-    // A menu is selected and open, but none of its children are selected,
-    // select the first menu item.
-    if (item->GetSubmenu()->GetMenuItemCount()) {
-      SetSelection(item->GetSubmenu()->GetMenuItemAt(0), SELECTION_DEFAULT);
-      return;
-    }
-  }
-
-  if (item->has_children()) {
-    CustomButton* button = GetFirstHotTrackedView(item);
-    if (button) {
-      button->SetHotTracked(false);
-      View* to_make_hot = GetNextFocusableView(item, button, delta == 1);
-      CustomButton* button_hot = CustomButton::AsCustomButton(to_make_hot);
-      if (button_hot) {
-        button_hot->SetHotTracked(true);
-        return;
-      }
-    } else {
-      View* to_make_hot = GetInitialFocusableView(item, delta == 1);
-      CustomButton* button_hot = CustomButton::AsCustomButton(to_make_hot);
-      if (button_hot) {
-        button_hot->SetHotTracked(true);
-        return;
-      }
-    }
-  }
-
-  MenuItemView* parent = item->GetParentMenuItem();
-  if (parent) {
-    int parent_count = parent->GetSubmenu()->GetMenuItemCount();
-    if (parent_count > 1) {
-      for (int i = 0; i < parent_count; ++i) {
-        if (parent->GetSubmenu()->GetMenuItemAt(i) == item) {
-          MenuItemView* to_select =
-              FindNextSelectableMenuItem(parent, i, delta);
-          if (!to_select)
-            break;
-          SetSelection(to_select, SELECTION_DEFAULT);
-          View* to_make_hot = GetInitialFocusableView(to_select, delta == 1);
-          CustomButton* button_hot = CustomButton::AsCustomButton(to_make_hot);
-          if (button_hot)
-            button_hot->SetHotTracked(true);
-          break;
-        }
-      }
-    }
-  }
-}
-
-MenuItemView* MenuController::FindNextSelectableMenuItem(MenuItemView* parent,
-                                                         int index,
-                                                         int delta) {
-  int start_index = index;
-  int parent_count = parent->GetSubmenu()->GetMenuItemCount();
-  // Loop through the menu items skipping any invisible menus. The loop stops
-  // when we wrap or find a visible child.
-  do {
-    index = (index + delta + parent_count) % parent_count;
-    if (index == start_index)
-      return NULL;
-    MenuItemView* child = parent->GetSubmenu()->GetMenuItemAt(index);
-    if (child->visible())
-      return child;
-  } while (index != start_index);
-  return NULL;
-}
-
-void MenuController::OpenSubmenuChangeSelectionIfCan() {
-  MenuItemView* item = pending_state_.item;
-  if (item->HasSubmenu() && item->enabled()) {
-    if (item->GetSubmenu()->GetMenuItemCount() > 0) {
-      SetSelection(item->GetSubmenu()->GetMenuItemAt(0),
-                   SELECTION_UPDATE_IMMEDIATELY);
-    } else {
-      // No menu items, just show the sub-menu.
-      SetSelection(item, SELECTION_OPEN_SUBMENU | SELECTION_UPDATE_IMMEDIATELY);
-    }
-  }
-}
-
-void MenuController::CloseSubmenu() {
-  MenuItemView* item = state_.item;
-  DCHECK(item);
-  if (!item->GetParentMenuItem())
-    return;
-  if (item->HasSubmenu() && item->GetSubmenu()->IsShowing())
-    SetSelection(item, SELECTION_UPDATE_IMMEDIATELY);
-  else if (item->GetParentMenuItem()->GetParentMenuItem())
-    SetSelection(item->GetParentMenuItem(), SELECTION_UPDATE_IMMEDIATELY);
-}
-
-MenuController::SelectByCharDetails MenuController::FindChildForMnemonic(
-    MenuItemView* parent,
-    base::char16 key,
-    bool (*match_function)(MenuItemView* menu, base::char16 mnemonic)) {
-  SubmenuView* submenu = parent->GetSubmenu();
-  DCHECK(submenu);
-  SelectByCharDetails details;
-
-  for (int i = 0, menu_item_count = submenu->GetMenuItemCount();
-       i < menu_item_count; ++i) {
-    MenuItemView* child = submenu->GetMenuItemAt(i);
-    if (child->enabled() && child->visible()) {
-      if (child == pending_state_.item)
-        details.index_of_item = i;
-      if (match_function(child, key)) {
-        if (details.first_match == -1)
-          details.first_match = i;
-        else
-          details.has_multiple = true;
-        if (details.next_match == -1 && details.index_of_item != -1 &&
-            i > details.index_of_item)
-          details.next_match = i;
-      }
-    }
-  }
-  return details;
-}
-
-bool MenuController::AcceptOrSelect(MenuItemView* parent,
-                                    const SelectByCharDetails& details) {
-  // This should only be invoked if there is a match.
-  DCHECK(details.first_match != -1);
-  DCHECK(parent->HasSubmenu());
-  SubmenuView* submenu = parent->GetSubmenu();
-  DCHECK(submenu);
-  if (!details.has_multiple) {
-    // There's only one match, activate it (or open if it has a submenu).
-    if (submenu->GetMenuItemAt(details.first_match)->HasSubmenu()) {
-      SetSelection(submenu->GetMenuItemAt(details.first_match),
-                   SELECTION_OPEN_SUBMENU | SELECTION_UPDATE_IMMEDIATELY);
-    } else {
-      Accept(submenu->GetMenuItemAt(details.first_match), 0);
-      return true;
-    }
-  } else if (details.index_of_item == -1 || details.next_match == -1) {
-    SetSelection(submenu->GetMenuItemAt(details.first_match),
-                 SELECTION_DEFAULT);
-  } else {
-    SetSelection(submenu->GetMenuItemAt(details.next_match),
-                 SELECTION_DEFAULT);
-  }
-  return false;
-}
-
-bool MenuController::SelectByChar(base::char16 character) {
-  base::char16 char_array[] = { character, 0 };
-  base::char16 key = base::i18n::ToLower(char_array)[0];
-  MenuItemView* item = pending_state_.item;
-  if (!item->HasSubmenu() || !item->GetSubmenu()->IsShowing())
-    item = item->GetParentMenuItem();
-  DCHECK(item);
-  DCHECK(item->HasSubmenu());
-  DCHECK(item->GetSubmenu());
-  if (item->GetSubmenu()->GetMenuItemCount() == 0)
-    return false;
-
-  // Look for matches based on mnemonic first.
-  SelectByCharDetails details =
-      FindChildForMnemonic(item, key, &MatchesMnemonic);
-  if (details.first_match != -1)
-    return AcceptOrSelect(item, details);
-
-  if (is_combobox_) {
-    item->GetSubmenu()->GetTextInputClient()->InsertChar(character, 0);
-  } else {
-    // If no mnemonics found, look at first character of titles.
-    details = FindChildForMnemonic(item, key, &TitleMatchesMnemonic);
-    if (details.first_match != -1)
-      return AcceptOrSelect(item, details);
-  }
-
-  return false;
-}
-
-void MenuController::RepostEvent(SubmenuView* source,
-                                 const ui::LocatedEvent& event) {
-  if (!event.IsMouseEvent()) {
-    // TODO(rbyers): Gesture event repost is tricky to get right
-    // crbug.com/170987.
-    DCHECK(event.IsGestureEvent());
-    return;
-  }
-
-#if defined(OS_WIN)
-  if (!state_.item) {
-    // We some times get an event after closing all the menus. Ignore it. Make
-    // sure the menu is in fact not visible. If the menu is visible, then
-    // we're in a bad state where we think the menu isn't visibile but it is.
-    DCHECK(!source->GetWidget()->IsVisible());
-    return;
-  }
-
-  state_.item->GetRootMenuItem()->GetSubmenu()->ReleaseCapture();
-#endif
-
-  gfx::Point screen_loc(event.location());
-  View::ConvertPointToScreen(source->GetScrollViewContainer(), &screen_loc);
-  gfx::NativeView native_view = source->GetWidget()->GetNativeView();
-  if (!native_view)
-    return;
-
-  gfx::Screen* screen = gfx::Screen::GetScreenFor(native_view);
-  gfx::NativeWindow window = screen->GetWindowAtScreenPoint(screen_loc);
-
-#if defined(OS_WIN)
-  // Convert screen_loc to pixels for the Win32 API's like WindowFromPoint,
-  // PostMessage/SendMessage to work correctly. These API's expect the
-  // coordinates to be in pixels.
-  // PostMessage() to metro windows isn't allowed (access will be denied). Don't
-  // try to repost with Win32 if the window under the mouse press is in metro.
-  if (!ViewsDelegate::views_delegate ||
-      !ViewsDelegate::views_delegate->IsWindowInMetro(window)) {
-    gfx::Point screen_loc_pixels = gfx::win::DIPToScreenPoint(screen_loc);
-    HWND target_window = window ? HWNDForNativeWindow(window) :
-                                  WindowFromPoint(screen_loc_pixels.ToPOINT());
-    HWND source_window = HWNDForNativeView(native_view);
-    if (!target_window || !source_window ||
-        GetWindowThreadProcessId(source_window, NULL) !=
-        GetWindowThreadProcessId(target_window, NULL)) {
-      // Even though we have mouse capture, windows generates a mouse event if
-      // the other window is in a separate thread. Only repost an event if
-      // |target_window| and |source_window| were created on the same thread,
-      // else double events can occur and lead to bad behavior.
-      return;
-    }
-
-    // Determine whether the click was in the client area or not.
-    // NOTE: WM_NCHITTEST coordinates are relative to the screen.
-    LPARAM coords = MAKELPARAM(screen_loc_pixels.x(), screen_loc_pixels.y());
-    LRESULT nc_hit_result = SendMessage(target_window, WM_NCHITTEST, 0, coords);
-    const bool client_area = nc_hit_result == HTCLIENT;
-
-    // TODO(sky): this isn't right. The event to generate should correspond with
-    // the event we just got. MouseEvent only tells us what is down, which may
-    // differ. Need to add ability to get changed button from MouseEvent.
-    int event_type;
-    int flags = event.flags();
-    if (flags & ui::EF_LEFT_MOUSE_BUTTON) {
-      event_type = client_area ? WM_LBUTTONDOWN : WM_NCLBUTTONDOWN;
-    } else if (flags & ui::EF_MIDDLE_MOUSE_BUTTON) {
-      event_type = client_area ? WM_MBUTTONDOWN : WM_NCMBUTTONDOWN;
-    } else if (flags & ui::EF_RIGHT_MOUSE_BUTTON) {
-      event_type = client_area ? WM_RBUTTONDOWN : WM_NCRBUTTONDOWN;
-    } else {
-      NOTREACHED();
-      return;
-    }
-
-    int window_x = screen_loc_pixels.x();
-    int window_y = screen_loc_pixels.y();
-    if (client_area) {
-      POINT pt = { window_x, window_y };
-      ScreenToClient(target_window, &pt);
-      window_x = pt.x;
-      window_y = pt.y;
-    }
-
-    WPARAM target = client_area ? event.native_event().wParam : nc_hit_result;
-    LPARAM window_coords = MAKELPARAM(window_x, window_y);
-    PostMessage(target_window, event_type, target, window_coords);
-    return;
-  }
-#endif
-  // Non-Windows Aura or |window| is in metro mode.
-  if (!window)
-    return;
-
-  message_loop_->RepostEventToWindow(event, window, screen_loc);
-}
-
-void MenuController::SetDropMenuItem(
-    MenuItemView* new_target,
-    MenuDelegate::DropPosition new_position) {
-  if (new_target == drop_target_ && new_position == drop_position_)
-    return;
-
-  if (drop_target_) {
-    drop_target_->GetParentMenuItem()->GetSubmenu()->SetDropMenuItem(
-        NULL, MenuDelegate::DROP_NONE);
-  }
-  drop_target_ = new_target;
-  drop_position_ = new_position;
-  if (drop_target_) {
-    drop_target_->GetParentMenuItem()->GetSubmenu()->SetDropMenuItem(
-        drop_target_, drop_position_);
-  }
-}
-
-void MenuController::UpdateScrolling(const MenuPart& part) {
-  if (!part.is_scroll() && !scroll_task_.get())
-    return;
-
-  if (!scroll_task_.get())
-    scroll_task_.reset(new MenuScrollTask());
-  scroll_task_->Update(part);
-}
-
-void MenuController::StopScrolling() {
-  scroll_task_.reset(NULL);
-}
-
-void MenuController::UpdateActiveMouseView(SubmenuView* event_source,
-                                           const ui::MouseEvent& event,
-                                           View* target_menu) {
-  View* target = NULL;
-  gfx::Point target_menu_loc(event.location());
-  if (target_menu && target_menu->has_children()) {
-    // Locate the deepest child view to send events to.  This code assumes we
-    // don't have to walk up the tree to find a view interested in events. This
-    // is currently true for the cases we are embedding views, but if we embed
-    // more complex hierarchies it'll need to change.
-    View::ConvertPointToScreen(event_source->GetScrollViewContainer(),
-                               &target_menu_loc);
-    View::ConvertPointFromScreen(target_menu, &target_menu_loc);
-    target = target_menu->GetEventHandlerForPoint(target_menu_loc);
-    if (target == target_menu || !target->enabled())
-      target = NULL;
-  }
-  View* active_mouse_view = GetActiveMouseView();
-  if (target != active_mouse_view) {
-    SendMouseCaptureLostToActiveView();
-    active_mouse_view = target;
-    SetActiveMouseView(active_mouse_view);
-    if (active_mouse_view) {
-      gfx::Point target_point(target_menu_loc);
-      View::ConvertPointToTarget(
-          target_menu, active_mouse_view, &target_point);
-      ui::MouseEvent mouse_entered_event(ui::ET_MOUSE_ENTERED,
-                                         target_point, target_point,
-                                         0, 0);
-      active_mouse_view->OnMouseEntered(mouse_entered_event);
-
-      ui::MouseEvent mouse_pressed_event(ui::ET_MOUSE_PRESSED,
-                                         target_point, target_point,
-                                         event.flags(),
-                                         event.changed_button_flags());
-      active_mouse_view->OnMousePressed(mouse_pressed_event);
-    }
-  }
-
-  if (active_mouse_view) {
-    gfx::Point target_point(target_menu_loc);
-    View::ConvertPointToTarget(target_menu, active_mouse_view, &target_point);
-    ui::MouseEvent mouse_dragged_event(ui::ET_MOUSE_DRAGGED,
-                                       target_point, target_point,
-                                       event.flags(),
-                                       event.changed_button_flags());
-    active_mouse_view->OnMouseDragged(mouse_dragged_event);
-  }
-}
-
-void MenuController::SendMouseReleaseToActiveView(SubmenuView* event_source,
-                                                  const ui::MouseEvent& event) {
-  View* active_mouse_view = GetActiveMouseView();
-  if (!active_mouse_view)
-    return;
-
-  gfx::Point target_loc(event.location());
-  View::ConvertPointToScreen(event_source->GetScrollViewContainer(),
-                             &target_loc);
-  View::ConvertPointFromScreen(active_mouse_view, &target_loc);
-  ui::MouseEvent release_event(ui::ET_MOUSE_RELEASED, target_loc, target_loc,
-                               event.flags(), event.changed_button_flags());
-  // Reset active mouse view before sending mouse released. That way if it calls
-  // back to us, we aren't in a weird state.
-  SetActiveMouseView(NULL);
-  active_mouse_view->OnMouseReleased(release_event);
-}
-
-void MenuController::SendMouseCaptureLostToActiveView() {
-  View* active_mouse_view = GetActiveMouseView();
-  if (!active_mouse_view)
-    return;
-
-  // Reset the active_mouse_view_ before sending mouse capture lost. That way if
-  // it calls back to us, we aren't in a weird state.
-  SetActiveMouseView(NULL);
-  active_mouse_view->OnMouseCaptureLost();
-}
-
-void MenuController::SetActiveMouseView(View* view) {
-  if (view)
-    ViewStorage::GetInstance()->StoreView(active_mouse_view_id_, view);
-  else
-    ViewStorage::GetInstance()->RemoveView(active_mouse_view_id_);
-}
-
-View* MenuController::GetActiveMouseView() {
-  return ViewStorage::GetInstance()->RetrieveView(active_mouse_view_id_);
-}
-
-void MenuController::SetExitType(ExitType type) {
-  exit_type_ = type;
-  // Exit nested message loops as soon as possible. We do this as
-  // MessagePumpDispatcher is only invoked before native events, which means
-  // its entirely possible for a Widget::CloseNow() task to be processed before
-  // the next native message. We quite the nested message loop as soon as
-  // possible to avoid having deleted views classes (such as widgets and
-  // rootviews) on the stack when the nested message loop stops.
-  //
-  // It's safe to invoke QuitNestedMessageLoop() multiple times, it only effects
-  // the current loop.
-  bool quit_now = message_loop_->ShouldQuitNow() && exit_type_ != EXIT_NONE &&
-      message_loop_depth_;
-  if (quit_now)
-    TerminateNestedMessageLoop();
-}
-
-void MenuController::TerminateNestedMessageLoop() {
-  message_loop_->QuitNow();
-}
-
-void MenuController::HandleMouseLocation(SubmenuView* source,
-                                         const gfx::Point& mouse_location) {
-  if (showing_submenu_)
-    return;
-
-  // Ignore mouse events if we're closing the menu.
-  if (exit_type_ != EXIT_NONE)
-    return;
-
-  MenuPart part = GetMenuPart(source, mouse_location);
-
-  UpdateScrolling(part);
-
-  if (!blocking_run_)
-    return;
-
-  if (part.type == MenuPart::NONE && ShowSiblingMenu(source, mouse_location))
-    return;
-
-  if (part.type == MenuPart::MENU_ITEM && part.menu) {
-    SetSelection(part.menu, SELECTION_OPEN_SUBMENU);
-  } else if (!part.is_scroll() && pending_state_.item &&
-             pending_state_.item->GetParentMenuItem() &&
-             (!pending_state_.item->HasSubmenu() ||
-              !pending_state_.item->GetSubmenu()->IsShowing())) {
-    // On exit if the user hasn't selected an item with a submenu, move the
-    // selection back to the parent menu item.
-    SetSelection(pending_state_.item->GetParentMenuItem(),
-                 SELECTION_OPEN_SUBMENU);
-  }
-}
-
-gfx::Screen* MenuController::GetScreen() {
-  Widget* root = owner_ ? owner_->GetTopLevelWidget() : NULL;
-  return root ? gfx::Screen::GetScreenFor(root->GetNativeView())
-              : gfx::Screen::GetNativeScreen();
-}
-
-}  // namespace views