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

ui/aura/test/mus/test_window_manager_client.cc

Index: ui/aura/test/mus/test_window_manager_client.cc
diff --git a/ui/aura/test/mus/test_window_manager_client.cc b/ui/aura/test/mus/test_window_manager_client.cc
index 713c3cc64ccd42087e887a08b7d50a65018e40b4..cf7e53a1ad41be37ef4c9e156fd1c3b47a95c4ec 100644
--- a/ui/aura/test/mus/test_window_manager_client.cc
+++ b/ui/aura/test/mus/test_window_manager_client.cc
@@ -57,6 +57,17 @@ void TestWindowManagerClient::WmSetNonClientCursor(uint32_t window_id,
                                                    ui::CursorData cursor_data) {
 }
 
+void TestWindowManagerClient::WmLockCursor() {}
+
+void TestWindowManagerClient::WmUnlockCursor() {}
+
+void TestWindowManagerClient::WmShowCursor() {}
+
+void TestWindowManagerClient::WmHideCursor() {}
+
+void TestWindowManagerClient::WmSetGlobalOverrideCursor(
+    base::Optional<ui::CursorData> cursor) {}
+
 void TestWindowManagerClient::OnWmCreatedTopLevelWindow(
     uint32_t change_id,
     Id transport_window_id) {}