Enable keyboard accelerators while a menu is open

ash/shell.cc

Index: ash/shell.cc
diff --git a/ash/shell.cc b/ash/shell.cc
index ef3686085518ff1135d95edc0e8bdbc45fcd4ba7..c71f3acecb1c8d10e5ffe7d53ba8f82c5e8e6143 100644
--- a/ash/shell.cc
+++ b/ash/shell.cc
@@ -9,6 +9,7 @@
 
 #include "ash/accelerators/accelerator_controller.h"
 #include "ash/accelerators/accelerator_delegate.h"
+#include "ash/accelerators/ash_menu_event_filter_delegate.h"
 #include "ash/accelerators/focus_manager_factory.h"
 #include "ash/accelerators/nested_accelerator_delegate.h"
 #include "ash/ash_switches.h"
@@ -101,6 +102,7 @@
 #include "ui/keyboard/keyboard_switches.h"
 #include "ui/keyboard/keyboard_util.h"
 #include "ui/message_center/message_center.h"
+#include "ui/views/controls/menu/menu_event_filter.h"
 #include "ui/views/corewm/tooltip_aura.h"
 #include "ui/views/corewm/tooltip_controller.h"
 #include "ui/views/focus/focus_manager_factory.h"
@@ -920,6 +922,10 @@ void Shell::Init(const ShellInitParams& init_params) {
   nested_accelerator_controller_.reset(
       new ::wm::NestedAcceleratorController(new NestedAcceleratorDelegate));
   accelerator_controller_.reset(new AcceleratorController);
+
+  menu_event_filter_delegate_.reset(new AshMenuEventFilterDelegate(
+      accelerator_controller_->accelerator_history()));
+
   maximize_mode_controller_.reset(new MaximizeModeController());
 
   AddPreTargetHandler(window_tree_host_manager_->input_method_event_handler());
@@ -1136,6 +1142,9 @@ void Shell::InitRootWindow(aura::Window* root_window) {
     aura::client::SetDispatcherClient(root_window,
                                       nested_accelerator_controller_.get());
   }
+
+  views::MenuEventFilter::SetMenuEventFilterDelegate(
+      root_window, menu_event_filter_delegate_.get());
 }
 
 bool Shell::CanWindowReceiveEvents(aura::Window* window) {