Allows ash accelerators in wrench menu

ash/accelerators/accelerator_dispatcher.h

Index: ash/accelerators/accelerator_dispatcher.h
diff --git a/ash/accelerators/accelerator_dispatcher.h b/ash/accelerators/accelerator_dispatcher.h
index 209b67dcc2ad011902d237c0536b31b2a1fea17e..61c228147261b2ff37ec5fb8fd4cd2f70680df5b 100644
--- a/ash/accelerators/accelerator_dispatcher.h
+++ b/ash/accelerators/accelerator_dispatcher.h
@@ -16,6 +16,7 @@ namespace ash {
 // Dispatcher for handling accelerators in ash.
 // Wraps a nested dispatcher to which control is passed if no accelerator key
 // has been pressed.
+// Inner dispatcher must represent widget with no editable content.
 // TODO(pkotwicz): Port AcceleratorDispatcher to mac.
 class ASH_EXPORT AcceleratorDispatcher : public MessageLoop::Dispatcher,
                                          public aura::WindowObserver {