Tab dragging as implemented as a mus API.

components/mus/ws/window_tree_client_unittest.cc

Index: components/mus/ws/window_tree_client_unittest.cc
diff --git a/components/mus/ws/window_tree_client_unittest.cc b/components/mus/ws/window_tree_client_unittest.cc
index 34169dd21522828cf9091f0da9cca94add0a1622..3b7176b20bed68f98e4d4c652818291ab0a4aa9b 100644
--- a/components/mus/ws/window_tree_client_unittest.cc
+++ b/components/mus/ws/window_tree_client_unittest.cc
@@ -414,6 +414,13 @@ class TestWindowTreeClient : public mojom::WindowTreeClient,
                                 bool janky) override {
     NOTIMPLEMENTED();
   }
+  void WmPerformMoveLoop(uint32_t change_id,
+                         uint32_t window_id,
+                         ::mus::mojom::MoveLoopSource source,
+                         const gfx::Point& cursor_location) override {
+    NOTIMPLEMENTED();
+  }
+  void WmCancelMoveLoop(uint32_t window_id) override { NOTIMPLEMENTED(); }
   void OnAccelerator(uint32_t id, std::unique_ptr<ui::Event> event) override {
     NOTIMPLEMENTED();
   }