mus: Implement Window Server Capture

components/mus/public/cpp/lib/in_flight_change.h

Index: components/mus/public/cpp/lib/in_flight_change.h
diff --git a/components/mus/public/cpp/lib/in_flight_change.h b/components/mus/public/cpp/lib/in_flight_change.h
index d92c3002185763785649d22040980a23e472b0c6..e585cd1c64bf1fa66d8b990e468ff14bd9a05a11 100644
--- a/components/mus/public/cpp/lib/in_flight_change.h
+++ b/components/mus/public/cpp/lib/in_flight_change.h
@@ -35,9 +35,11 @@ enum class ChangeType {
   NEW_TOP_LEVEL_WINDOW,
   PREDEFINED_CURSOR,
   PROPERTY,
+  RELEASE_CAPTURE,
   REMOVE_CHILD,
   REMOVE_TRANSIENT_WINDOW_FROM_PARENT,
   REORDER,
+  SET_CAPTURE,
   VISIBLE,
 };
 
@@ -155,6 +157,21 @@ class CrashInFlightChange : public InFlightChange {
   DISALLOW_COPY_AND_ASSIGN(CrashInFlightChange);
 };
 
+class InFlightCaptureChange : public InFlightChange {
+ public:
+  InFlightCaptureChange(Window* window, bool revert_value);
+  ~InFlightCaptureChange() override;
+
+  // InFlightChange:
+  void SetRevertValueFrom(const InFlightChange& change) override;
+  void Revert() override;
+
+ private:
+  bool revert_value_;
+
+  DISALLOW_COPY_AND_ASSIGN(InFlightCaptureChange);
+};
+
 // Focus is really a property of the WindowTreeConnection and not the Window.
 // As such, InFlightFocusChange is special in that it is not associated with
 // a particular window (InFlightFocusChange::window() returns null). Internally