Move AcceleratorController from WmShell to Shell

ash/shelf/shelf_layout_manager_unittest.cc

Index: ash/shelf/shelf_layout_manager_unittest.cc
diff --git a/ash/shelf/shelf_layout_manager_unittest.cc b/ash/shelf/shelf_layout_manager_unittest.cc
index 64983c19691a07821ed187dd228b45f5d3e0ae0d..020421963e09a8562ef33d04af1510979e0a6bfd 100644
--- a/ash/shelf/shelf_layout_manager_unittest.cc
+++ b/ash/shelf/shelf_layout_manager_unittest.cc
@@ -1501,7 +1501,7 @@ TEST_F(ShelfLayoutManagerTest, ShelfFlickerOnTrayActivation) {
   EXPECT_EQ(SHELF_AUTO_HIDE_HIDDEN, shelf->GetAutoHideState());
 
   // Show the status menu. That should make the shelf visible again.
-  WmShell::Get()->accelerator_controller()->PerformActionIfEnabled(
+  Shell::Get()->accelerator_controller()->PerformActionIfEnabled(
       SHOW_SYSTEM_TRAY_BUBBLE);
   EXPECT_EQ(SHELF_AUTO_HIDE, shelf->GetVisibilityState());
   EXPECT_EQ(SHELF_AUTO_HIDE_SHOWN, shelf->GetAutoHideState());