Enable keyboard accelerators while a menu is open

ash/accelerators/ash_menu_event_filter_delegate.cc

Index: ash/accelerators/ash_menu_event_filter_delegate.cc
diff --git a/ash/accelerators/ash_menu_event_filter_delegate.cc b/ash/accelerators/ash_menu_event_filter_delegate.cc
new file mode 100644
index 0000000000000000000000000000000000000000..865fbfb3e208df2b2434184d19f6c55ef98b24e9
--- /dev/null
+++ b/ash/accelerators/ash_menu_event_filter_delegate.cc
@@ -0,0 +1,44 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ash/accelerators/ash_menu_event_filter_delegate.h"
+
+#include "ash/accelerators/accelerator_controller.h"
+#include "ash/shell.h"
+#include "ui/views/controls/menu/menu_event_filter.h"
+
+namespace ash {
+
+AshMenuEventFilterDelegate::AshMenuEventFilterDelegate(
+    ui::AcceleratorHistory* history)
+    : accelerator_history_(history) {
+  DCHECK(history);
+}
+
+AshMenuEventFilterDelegate::~AshMenuEventFilterDelegate() {
+}
+
+void AshMenuEventFilterDelegate::StoreInHistory(
+    const ui::Accelerator& accelerator) {
+  accelerator_history_->StoreCurrentAccelerator(accelerator);
+}
+
+bool AshMenuEventFilterDelegate::ProcessAccelerator(
+    const ui::Accelerator& accelerator,
+    views::MenuEventFilter* owner) {
+  ash::AcceleratorController* accelerator_controller =
+      ash::Shell::GetInstance()->accelerator_controller();
+  if (accelerator_controller->ShouldMenuBeKeptOpenForAccelerator(accelerator)) {
+    // Menu will be kept open and accelerator will be handled now.
+    accelerator_controller->Process(accelerator);
+    // Event propagation should be stopped.
+    return true;
+  }
+
+  // Menu should be closed and the event should continue propagation.
+  owner->CloseMenu();
+  return false;
+}
+
+}  // namespace ash