Prevents reentrant CompleteDrag when changing display configuration

ash/wm/toplevel_window_event_handler.cc

Index: ash/wm/toplevel_window_event_handler.cc
diff --git a/ash/wm/toplevel_window_event_handler.cc b/ash/wm/toplevel_window_event_handler.cc
index ef8051d1eb1c83c1d0170eda29f744d5a5ba0dfe..10b2a886edb2212b6f8b837baf128f483dab7e9f 100644
--- a/ash/wm/toplevel_window_event_handler.cc
+++ b/ash/wm/toplevel_window_event_handler.cc
@@ -376,10 +376,7 @@ void ToplevelWindowEventHandler::EndMoveLoop() {
     return;
 
   in_move_loop_ = false;
-  if (window_resizer_) {
-    window_resizer_->resizer()->RevertDrag();
-    window_resizer_.reset();
-  }
+  CompleteDrag(DRAG_REVERT, 0);
   quit_closure_.Run();
 }
 
@@ -387,9 +384,8 @@ void ToplevelWindowEventHandler::OnDisplayConfigurationChanging() {
   if (in_move_loop_) {
     move_cancelled_ = true;
     EndMoveLoop();
-  } else if (window_resizer_) {
-    window_resizer_->resizer()->RevertDrag();
-    window_resizer_.reset();
+  } else {
+    CompleteDrag(DRAG_REVERT, 0);
   }
 }