Moves AcceleratorController from Shell to WmShell

ash/common/wm_shell.cc

Index: ash/common/wm_shell.cc
diff --git a/ash/common/wm_shell.cc b/ash/common/wm_shell.cc
index f0cb0180e11ac02d99348366cea072d57d3c534a..35b8dfa55e4cb2741e7dd347694617e595d1caf2 100644
--- a/ash/common/wm_shell.cc
+++ b/ash/common/wm_shell.cc
@@ -6,6 +6,7 @@
 
 #include <utility>
 
+#include "ash/common/accelerators/accelerator_controller.h"
 #include "ash/common/accessibility_delegate.h"
 #include "ash/common/focus_cycler.h"
 #include "ash/common/keyboard/keyboard_ui.h"
@@ -215,4 +216,9 @@ void WmShell::DeleteToastManager() {
   toast_manager_.reset();
 }
 
+void WmShell::SetAcceleratorController(
+    std::unique_ptr<AcceleratorController> accelerator_controller) {
+  accelerator_controller_ = std::move(accelerator_controller);
+}
+
 }  // namespace ash