Fixes issue with accelerators when a menu is open

ash/accelerators/accelerator_controller.h

Index: ash/accelerators/accelerator_controller.h
diff --git a/ash/accelerators/accelerator_controller.h b/ash/accelerators/accelerator_controller.h
index b121807e7f194a2e559980b8c91dd5c410ef13ac..085156bfb8e10532140ffb7bcbea396e907ee1ee 100644
--- a/ash/accelerators/accelerator_controller.h
+++ b/ash/accelerators/accelerator_controller.h
@@ -12,6 +12,7 @@
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "ash/ash_export.h"
+#include "ui/aura/client/accelerator_client.h"
 #include "ui/base/accelerators/accelerator.h"
 
 namespace ui {
@@ -26,7 +27,8 @@ class CapsLockDelegate;
 // AcceleratorController provides functions for registering or unregistering
 // global keyboard accelerators, which are handled earlier than any windows. It
 // also implements several handlers as an accelerator target.
-class ASH_EXPORT AcceleratorController : public ui::AcceleratorTarget {
+class ASH_EXPORT AcceleratorController : public aura::client::AcceleratorClient,
+                                         public ui::AcceleratorTarget {
  public:
   AcceleratorController();
   virtual ~AcceleratorController();