mus: Implement interwindow drag and drop

services/ui/public/cpp/in_flight_change.cc

Index: services/ui/public/cpp/in_flight_change.cc
diff --git a/services/ui/public/cpp/in_flight_change.cc b/services/ui/public/cpp/in_flight_change.cc
index aea803e55ca8ce506c1a40cf07c535827d4fe115..0a1669d927f52b24cc245dc5dea9ac6b0df99a28 100644
--- a/services/ui/public/cpp/in_flight_change.cc
+++ b/services/ui/public/cpp/in_flight_change.cc
@@ -39,14 +39,14 @@ void InFlightBoundsChange::Revert() {
   WindowPrivate(window()).LocalSetBounds(window()->bounds(), revert_bounds_);
 }
 
-// InFlightMoveLoopChange -----------------------------------------------------
+// InFlightDragChange -----------------------------------------------------
 
-InFlightMoveLoopChange::InFlightMoveLoopChange(Window* window)
+InFlightDragChange::InFlightDragChange(Window* window)
     : InFlightChange(window, ChangeType::MOVE_LOOP) {}

[sky, 2016/09/13 18:15:31]

You're using this for both move and drag now. Pass in the change type?

 
-void InFlightMoveLoopChange::SetRevertValueFrom(const InFlightChange& change) {}
+void InFlightDragChange::SetRevertValueFrom(const InFlightChange& change) {}
 
-void InFlightMoveLoopChange::Revert() {
+void InFlightDragChange::Revert() {
   // Reverting bounds happens in the window server in the error case; it cannot

[sky, 2016/09/13 18:15:31]

remove stale comment.

   // happen in the client because this could conflict with a
   // InFlightBoundsChange.