Add {Lock,Unlock,Show,Hide}Cursor() to the window manager mojom.

ui/aura/test/mus/test_window_manager_client.h

Index: ui/aura/test/mus/test_window_manager_client.h
diff --git a/ui/aura/test/mus/test_window_manager_client.h b/ui/aura/test/mus/test_window_manager_client.h
index e46d314df473d7cb472d81a29c66d140d8258eab..468f6d10586f0c33285af19716c50ee2a0b70d45 100644
--- a/ui/aura/test/mus/test_window_manager_client.h
+++ b/ui/aura/test/mus/test_window_manager_client.h
@@ -48,6 +48,11 @@ class TestWindowManagerClient : public ui::mojom::WindowManagerClient {
       ui::mojom::FrameDecorationValuesPtr values) override;
   void WmSetNonClientCursor(uint32_t window_id,
                             ui::CursorData cursor_data) override;
+  void WmLockCursor() override;
+  void WmUnlockCursor() override;
+  void WmSetCursorVisible(bool visible) override;
+  void WmSetGlobalOverrideCursor(
+      base::Optional<ui::CursorData> cursor) override;
   void OnWmCreatedTopLevelWindow(uint32_t change_id,
                                  Id transport_window_id) override;
   void OnAcceleratorAck(