Moves AcceleratorController from Shell to WmShell

ash/mus/bridge/wm_shell_mus.cc

Index: ash/mus/bridge/wm_shell_mus.cc
diff --git a/ash/mus/bridge/wm_shell_mus.cc b/ash/mus/bridge/wm_shell_mus.cc
index 9b7aecd237877dfd3a6656626afcbc38486df501..195250df2644716dc4aec814cbbce0e2c7711a89 100644
--- a/ash/mus/bridge/wm_shell_mus.cc
+++ b/ash/mus/bridge/wm_shell_mus.cc
@@ -6,6 +6,7 @@
 
 #include <utility>
 
+#include "ash/common/accelerators/accelerator_controller.h"
 #include "ash/common/display/display_info.h"
 #include "ash/common/keyboard/keyboard_ui.h"
 #include "ash/common/session/session_state_delegate.h"
@@ -19,6 +20,7 @@
 #include "ash/common/wm/window_cycle_event_filter.h"
 #include "ash/common/wm/window_resizer.h"
 #include "ash/common/wm_activation_observer.h"
+#include "ash/mus/accelerators/accelerator_controller_delegate_mus.h"
 #include "ash/mus/bridge/wm_root_window_controller_mus.h"
 #include "ash/mus/bridge/wm_window_mus.h"
 #include "ash/mus/container_ids.h"
@@ -104,6 +106,10 @@ WmShellMus::WmShellMus(std::unique_ptr<ShellDelegate> shell_delegate,
   client_->AddObserver(this);
   WmShell::Set(this);
 
+  accelerator_controller_delegate_.reset(new AcceleratorControllerDelegateMus);
+  SetAcceleratorController(base::MakeUnique<AcceleratorController>(
+      accelerator_controller_delegate_.get()));
+
   CreateMaximizeModeController();
 
   CreateMruWindowTracker();