Tab dragging as implemented as a mus API.

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 bf77fc6e6b10a00d2bbb2aa8f47eac636561b908..d6ad40090725238eddd578b1b2acce99929155ed 100644
--- a/components/mus/public/cpp/lib/in_flight_change.h
+++ b/components/mus/public/cpp/lib/in_flight_change.h
@@ -33,8 +33,9 @@ enum class ChangeType {
   CAPTURE,
   DELETE_WINDOW,
   FOCUS,
-  NEW_WINDOW,
+  MOVE_LOOP,
   NEW_TOP_LEVEL_WINDOW,
+  NEW_WINDOW,
   OPACITY,
   PREDEFINED_CURSOR,
   PROPERTY,
@@ -143,6 +144,18 @@ class InFlightBoundsChange : public InFlightChange {
   DISALLOW_COPY_AND_ASSIGN(InFlightBoundsChange);
 };
 
+class InFlightMoveLoopChange : public InFlightChange {
+ public:
+  InFlightMoveLoopChange(Window* window);

[sky, 2016/06/29 00:04:08]

explicit

+
+  // InFlightChange:
+  void SetRevertValueFrom(const InFlightChange& change) override;
+  void Revert() override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(InFlightMoveLoopChange);
+};
+
 // Inflight change that crashes on failure. This is useful for changes that are
 // expected to always complete.
 class CrashInFlightChange : public InFlightChange {