Fixes issue with accelerators when a menu is open

ui/aura/client/dispatcher_client.cc

Index: ui/aura/client/dispatcher_client.cc
diff --git a/ui/aura/client/dispatcher_client.cc b/ui/aura/client/dispatcher_client.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f9cd3ac956c66c97b85be4c948b9403f53939ab5
--- /dev/null
+++ b/ui/aura/client/dispatcher_client.cc
@@ -0,0 +1,31 @@
+// 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/aura/client/dispatcher_client.h"
+
+#include "ui/aura/root_window.h"
+
+namespace aura {
+
+namespace client {
+
+namespace {
+
+// A property key to store the nested dispatcher controller. The type of the
+// value is |aura::client::DispatcherClient*|.
+const char kDispatcherClient[] = "AuraDispatcherClient";
+
+}  // namespace
+
+void SetDispatcherClient(DispatcherClient* client) {
+  RootWindow::GetInstance()->SetProperty(kDispatcherClient, client);
+}
+
+DispatcherClient* GetDispatcherClient() {
+  return reinterpret_cast<DispatcherClient*>(
+      RootWindow::GetInstance()->GetProperty(kDispatcherClient));
+}
+
+}  // namespace client
+}  // namespace aura