Tab dragging as implemented as a mus API.

components/mus/ws/window_server.cc

 // Copyright 2014 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 "components/mus/ws/window_server.h"
 
 #include <set>
 #include <string>
 
 #include "base/logging.h"
@@ skipping 294 matching lines @@
       !window || window->id().client_id != wm_tree->id() ||
       !window->children().empty() || GetTreeWithRoot(window)) {
     WindowManagerSentBogusMessage();
     return;
   }
 
   tree->OnWindowManagerCreatedTopLevelWindow(window_manager_change_id,
                                              change.client_change_id, window);
 }
 
+void WindowServer::WindowManagerCompletedMoveLoop(
+    uint32_t window_manager_change_id,
+    const ServerWindow* window,
+    bool completed) {
+  InFlightWindowManagerChange change;
+  if (!GetAndClearInFlightWindowManagerChange(window_manager_change_id,
+                                              &change)) {
+    return;
+  }
+  if (!window) {
+    WindowManagerSentBogusMessage();
+    return;
+  }
+
+  WindowTree* tree = GetTreeWithId(change.client_id);
+  tree->OnMoveLoopCompleted(change.client_change_id, completed);
+}
+
 void WindowServer::ProcessWindowBoundsChanged(const ServerWindow* window,
                                               const gfx::Rect& old_bounds,
                                               const gfx::Rect& new_bounds) {
   for (auto& pair : tree_map_) {
     pair.second->ProcessWindowBoundsChanged(window, old_bounds, new_bounds,
                                             IsOperationSource(pair.first));
   }
 }
 
 void WindowServer::ProcessClientAreaChanged(
@@ skipping 346 matching lines @@
           .GetGlobalWindowManagerStateForUser(user_id);
   if (!global_window_manager_state)
     return false;
   if (values && global_window_manager_state->got_frame_decoration_values())
     *values = global_window_manager_state->frame_decoration_values().Clone();
   return global_window_manager_state->got_frame_decoration_values();
 }
 
 }  // namespace ws
 }  // namespace mus