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/label.cc ui/views/controls/label.cc
index 9b04c09..5d99c81 100644
--- ui/views/controls/label.cc
+++ ui/views/controls/label.cc
@@ -28,6 +28,7 @@
 #include "ui/gfx/color_utils.h"
 #include "ui/gfx/geometry/insets.h"
 #include "ui/gfx/text_elider.h"
+#include "ui/gfx/text_utils.h"
 #include "ui/native_theme/native_theme.h"
 #include "ui/strings/grit/ui_strings.h"
 #include "ui/views/controls/menu/menu_runner.h"
@@ -36,6 +37,25 @@
 #include "ui/views/selection_controller.h"
 
 namespace views {
+
+namespace {
+
+// Strips accelerator character prefixes in |text| if needed, based on |flags|.
+// Returns a range in |text| to underline or Range::InvalidRange() if
+// underlining is not needed.
+gfx::Range StripAcceleratorChars(int flags, base::string16* text) {
+  if (flags & (gfx::Canvas::SHOW_PREFIX | gfx::Canvas::HIDE_PREFIX)) {
+    int char_pos = -1;
+    int char_span = 0;
+    *text = gfx::RemoveAcceleratorChar(*text, '&', &char_pos, &char_span);
+    if ((flags & gfx::Canvas::SHOW_PREFIX) && char_pos != -1)
+      return gfx::Range(char_pos, char_pos + char_span);
+  }
+  return gfx::Range::InvalidRange();
+}
+
+}  // namespace
+
 // static
 const char Label::kViewClassName[] = "Label";
 const int Label::kFocusBorderPadding = 1;
@@ -210,6 +230,14 @@ void Label::SetElideBehavior(gfx::ElideBehavior elide_behavior) {
   ResetLayout();
 }
 
+void Label::SetDrawStringsFlags(int flags) {
+  if (draw_strings_flags_ == flags)
+    return;
+  is_first_paint_text_ = true;
+  draw_strings_flags_ = flags;
+  ResetLayout();
+}
+
 void Label::SetTooltipText(const base::string16& tooltip_text) {
   DCHECK(handles_tooltips_);
   tooltip_text_ = tooltip_text;
@@ -440,7 +468,19 @@ std::unique_ptr<gfx::RenderText> Label::CreateRenderText(
   render_text->SetFontList(font_list());
   render_text->set_shadows(shadows());
   render_text->SetCursorEnabled(false);
-  render_text->SetText(text);
+
+  if (draw_strings_flags_ != 0) {
+    base::string16 text_str = text;
+    gfx::Range range = StripAcceleratorChars(draw_strings_flags_, &text_str);
+    render_text->SetText(text_str);
+    if (range.IsValid()) {
+      render_text->SetDisplayRect(bounds());
+      render_text->ApplyStyle(gfx::UNDERLINE, true, range);
+    }
+  } else {
+    render_text->SetText(text);
+  }
+
   return render_text;
 }
 
diff --git ui/views/controls/label.h ui/views/controls/label.h
index 6293cff..d0a5a8f 100644
--- ui/views/controls/label.h
+++ ui/views/controls/label.h
@@ -117,6 +117,10 @@ class VIEWS_EXPORT Label : public View,
   void SetElideBehavior(gfx::ElideBehavior elide_behavior);
   gfx::ElideBehavior elide_behavior() const { return elide_behavior_; }
 
+  // Get or set the flags that control display of accelerator characters.
+  void SetDrawStringsFlags(int flags);
+  int draw_strings_flags() const { return draw_strings_flags_; }
+
   // Sets the tooltip text.  Default behavior for a label (single-line) is to
   // show the full text if it is wider than its bounds.  Calling this overrides
   // the default behavior and lets you set a custom tooltip.  To revert to
@@ -333,6 +337,7 @@ class VIEWS_EXPORT Label : public View,
   bool collapse_when_hidden_;
   int fixed_width_;
   int max_width_;
+  int draw_strings_flags_ = 0;
 
   // TODO(ckocagil): Remove is_first_paint_text_ before crbug.com/441028 is
   // closed.
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;