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 e4d77a5e4658f473e824612e8fa18570d95b5fce..3c39c4d59ca67ec7fea0c5943ab4e61ec5897703 100644
--- a/components/mus/ws/window_tree_client_unittest.cc
+++ b/components/mus/ws/window_tree_client_unittest.cc
@@ -374,6 +374,7 @@ class TestWindowTreeClient : public mojom::WindowTreeClient,
       change_completed_run_loop_->Quit();
     }
   }
+  void OnMoveLoopCompleted(uint32_t change_id, bool success) override {}
   void RequestClose(uint32_t window_id) override {}
   void GetWindowManager(mojo::AssociatedInterfaceRequest<mojom::WindowManager>
                             internal) override {
@@ -412,6 +413,12 @@ class TestWindowTreeClient : public mojom::WindowTreeClient,
                                 bool janky) override {
     NOTIMPLEMENTED();
   }
+  void WmPerformMoveLoop(uint32_t change_id,
+                         uint32_t window_id,
+                         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();
   }