Fix bug in keeping capture in sync during destruction

ui/aura/mus/in_flight_change.h

Index: ui/aura/mus/in_flight_change.h
diff --git a/ui/aura/mus/in_flight_change.h b/ui/aura/mus/in_flight_change.h
index 7199521e97cf1553b6f4f9c5c27ab9c91c713b5c..eb8d8876feaa86d115ca934cdb679647b6475771 100644
--- a/ui/aura/mus/in_flight_change.h
+++ b/ui/aura/mus/in_flight_change.h
@@ -27,6 +27,7 @@ enum class Cursor : int32_t;
 
 namespace aura {
 
+class CaptureSynchronizer;
 class WindowMus;
 class WindowTreeClient;
 
@@ -215,13 +216,16 @@ class InFlightWindowTreeClientChange : public InFlightChange,
 
 class InFlightCaptureChange : public InFlightWindowTreeClientChange {
  public:
-  InFlightCaptureChange(WindowTreeClient* client, WindowMus* revert_value);
+  InFlightCaptureChange(WindowTreeClient* client,
+                        CaptureSynchronizer* capture_synchronizer,
+                        WindowMus* revert_value);
   ~InFlightCaptureChange() override;
 
   // InFlightChange:
   void Revert() override;
 
  private:
+  CaptureSynchronizer* capture_synchronizer_;
   DISALLOW_COPY_AND_ASSIGN(InFlightCaptureChange);
 };