Move more from WmShell to Shell

ash/accelerators/accelerator_controller_unittest.cc

Index: ash/accelerators/accelerator_controller_unittest.cc
diff --git a/ash/accelerators/accelerator_controller_unittest.cc b/ash/accelerators/accelerator_controller_unittest.cc
index a449c4ae85ed4551753abe448a3090010f1784d6..34289d1f5a0957f9718758c62150013d9b3b234a 100644
--- a/ash/accelerators/accelerator_controller_unittest.cc
+++ b/ash/accelerators/accelerator_controller_unittest.cc
@@ -265,12 +265,12 @@ class AcceleratorControllerTest : public test::AshTestBase {
 
   void SetBrightnessControlDelegate(
       std::unique_ptr<BrightnessControlDelegate> delegate) {
-    WmShell::Get()->brightness_control_delegate_ = std::move(delegate);
+    Shell::Get()->brightness_control_delegate_ = std::move(delegate);
   }
 
   void SetKeyboardBrightnessControlDelegate(
       std::unique_ptr<KeyboardBrightnessControlDelegate> delegate) {
-    WmShell::Get()->keyboard_brightness_control_delegate_ = std::move(delegate);
+    Shell::Get()->keyboard_brightness_control_delegate_ = std::move(delegate);
   }
 
  private: