diff --git ui/base/models/menu_model.h ui/base/models/menu_model.h
index 0755f27..72db677 100644
--- ui/base/models/menu_model.h
+++ ui/base/models/menu_model.h
@@ -15,6 +15,7 @@
 namespace gfx {
 class FontList;
 class Image;
+class Point;
 }
 
 namespace ui {
@@ -115,6 +116,15 @@ class UI_BASE_EXPORT MenuModel {
   // |event_flags| is a bit mask of ui::EventFlags.
   virtual void ActivatedAt(int index, int event_flags);
 
+  // Called when the user moves the mouse outside the menu and over the owning
+  // window.
+  virtual void MouseOutsideMenu(const gfx::Point& screen_point) {}
+
+  // Called on unhandled open/close submenu keyboard commands. |is_rtl| will be
+  // true if the menu is displaying a right-to-left language.
+  virtual void UnhandledOpenSubmenu(bool is_rtl) {}
+  virtual void UnhandledCloseSubmenu(bool is_rtl) {}
+
   // Called when the menu is about to be shown.
   virtual void MenuWillShow() {}
 
diff --git ui/views/controls/menu/menu_controller.cc ui/views/controls/menu/menu_controller.cc
index 79ff77c..a0582c0 100644
--- ui/views/controls/menu/menu_controller.cc
+++ ui/views/controls/menu/menu_controller.cc
@@ -2254,8 +2254,13 @@ MenuItemView* MenuController::FindNextSelectableMenuItem(
 
 void MenuController::OpenSubmenuChangeSelectionIfCan() {
   MenuItemView* item = pending_state_.item;
-  if (!item->HasSubmenu() || !item->enabled())
+  if (!item->HasSubmenu() || !item->enabled() || !item->GetParentMenuItem()) {
+    MenuItemView* submenu_item =
+        item->GetParentMenuItem() ? item->GetParentMenuItem() : item;
+    submenu_item->GetDelegate()->OnUnhandledOpenSubmenu(submenu_item,
+                                                        base::i18n::IsRTL());
     return;
+  }
   MenuItemView* to_select = NULL;
   if (item->GetSubmenu()->GetMenuItemCount() > 0)
     to_select = FindInitialSelectableMenuItem(item, INCREMENT_SELECTION_DOWN);
@@ -2270,8 +2275,10 @@ void MenuController::OpenSubmenuChangeSelectionIfCan() {
 void MenuController::CloseSubmenu() {
   MenuItemView* item = state_.item;
   DCHECK(item);
-  if (!item->GetParentMenuItem())
+  if (!item->GetParentMenuItem()) {
+    item->GetDelegate()->OnUnhandledCloseSubmenu(item, base::i18n::IsRTL());
     return;
+  }
   if (item->HasSubmenu() && item->GetSubmenu()->IsShowing())
     SetSelection(item, SELECTION_UPDATE_IMMEDIATELY);
   else if (item->GetParentMenuItem()->GetParentMenuItem())
diff --git ui/views/controls/menu/menu_delegate.h ui/views/controls/menu/menu_delegate.h
index 3b7cb7f..3ad68d0 100644
--- ui/views/controls/menu/menu_delegate.h
+++ ui/views/controls/menu/menu_delegate.h
@@ -229,6 +229,11 @@ class VIEWS_EXPORT MenuDelegate {
                                        bool* has_mnemonics,
                                        MenuButton** button);
 
+  // Called on unhandled open/close submenu keyboard commands. |is_rtl| will be
+  // true if the menu is displaying a right-to-left language.
+  virtual void OnUnhandledOpenSubmenu(MenuItemView* menu, bool is_rtl) {}
+  virtual void OnUnhandledCloseSubmenu(MenuItemView* menu, bool is_rtl) {}
+
   // Returns the max width menus can grow to be.
   virtual int GetMaxWidthForMenu(MenuItemView* menu);
 
diff --git ui/views/controls/menu/menu_model_adapter.cc ui/views/controls/menu/menu_model_adapter.cc
index bc04dcb..b2ec114 100644
--- ui/views/controls/menu/menu_model_adapter.cc
+++ ui/views/controls/menu/menu_model_adapter.cc
@@ -245,6 +245,49 @@ void MenuModelAdapter::SelectionChanged(MenuItemView* menu) {
   NOTREACHED();
 }
 
+MenuItemView* MenuModelAdapter::GetSiblingMenu(MenuItemView* menu,
+                                               const gfx::Point& screen_point,
+                                               MenuAnchorPosition* anchor,
+                                               bool* has_mnemonics,
+                                               MenuButton** button) {
+  // Look up the menu model for this menu.
+  const std::map<MenuItemView*, ui::MenuModel*>::const_iterator map_iterator =
+      menu_map_.find(menu);
+  if (map_iterator != menu_map_.end()) {
+    map_iterator->second->MouseOutsideMenu(screen_point);
+    return nullptr;
+  }
+
+  NOTREACHED();
+  return nullptr;
+}
+
+void MenuModelAdapter::OnUnhandledOpenSubmenu(MenuItemView* menu,
+                                              bool is_rtl) {
+  // Look up the menu model for this menu.
+  const std::map<MenuItemView*, ui::MenuModel*>::const_iterator map_iterator =
+      menu_map_.find(menu);
+  if (map_iterator != menu_map_.end()) {
+    map_iterator->second->UnhandledOpenSubmenu(is_rtl);
+    return;
+  }
+
+  NOTREACHED();
+}
+
+void MenuModelAdapter::OnUnhandledCloseSubmenu(MenuItemView* menu,
+                                               bool is_rtl) {
+  // Look up the menu model for this menu.
+  const std::map<MenuItemView*, ui::MenuModel*>::const_iterator map_iterator =
+      menu_map_.find(menu);
+  if (map_iterator != menu_map_.end()) {
+    map_iterator->second->UnhandledCloseSubmenu(is_rtl);
+    return;
+  }
+
+  NOTREACHED();
+}
+
 void MenuModelAdapter::WillShowMenu(MenuItemView* menu) {
   // Look up the menu model for this menu.
   const std::map<MenuItemView*, ui::MenuModel*>::const_iterator map_iterator =
diff --git ui/views/controls/menu/menu_model_adapter.h ui/views/controls/menu/menu_model_adapter.h
index c9799da..c7ecca6 100644
--- ui/views/controls/menu/menu_model_adapter.h
+++ ui/views/controls/menu/menu_model_adapter.h
@@ -76,6 +76,13 @@ class VIEWS_EXPORT MenuModelAdapter : public MenuDelegate {
   bool IsCommandVisible(int id) const override;
   bool IsItemChecked(int id) const override;
   void SelectionChanged(MenuItemView* menu) override;
+  MenuItemView* GetSiblingMenu(MenuItemView* menu,
+                               const gfx::Point& screen_point,
+                               MenuAnchorPosition* anchor,
+                               bool* has_mnemonics,
+                               MenuButton** button) override;
+  void OnUnhandledOpenSubmenu(MenuItemView* menu, bool is_rtl) override;
+  void OnUnhandledCloseSubmenu(MenuItemView* menu, bool is_rtl) override;
   void WillShowMenu(MenuItemView* menu) override;
   void WillHideMenu(MenuItemView* menu) override;
   void OnMenuClosed(MenuItemView* menu, MenuRunner::RunResult result) override;