Tab dragging as implemented as a mus API.

services/ui/test_wm/test_wm.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mojo/public/c/system/main.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "services/shell/public/cpp/application_runner.h"
 #include "services/shell/public/cpp/connector.h"
 #include "services/shell/public/cpp/service.h"
 #include "services/ui/public/cpp/window.h"
@@ skipping 71 matching lines @@
     window_manager_client_->AddActivationParent(root_);
     ui::mojom::FrameDecorationValuesPtr frame_decoration_values =
         ui::mojom::FrameDecorationValues::New();
     frame_decoration_values->max_title_bar_button_width = 0;
     window_manager_client_->SetFrameDecorationValues(
         std::move(frame_decoration_values));
   }
   void OnAccelerator(uint32_t id, const ui::Event& event) override {
     // Don't care.
   }
+  void OnWmPerformMoveLoop(Window* window,
+                           mojom::MoveLoopSource source,
+                           const gfx::Point& cursor_location,
+                           const base::Callback<void(bool)>& on_done) override {
+    // Don't care.
+  }
+  void OnWmCancelMoveLoop(Window* window) override {}
 
   ui::Window* root_ = nullptr;
   ui::WindowManagerClient* window_manager_client_ = nullptr;
   // See WindowTreeClient for details on ownership.
   ui::WindowTreeClient* window_tree_client_ = nullptr;
 
   DISALLOW_COPY_AND_ASSIGN(TestWM);
 };
 
 }  // namespace test
 }  // namespace ui
 
 MojoResult MojoMain(MojoHandle shell_handle) {
   shell::ApplicationRunner runner(new ui::test::TestWM);
   return runner.Run(shell_handle);
 }