mus: Implement interwindow drag and drop

services/ui/public/cpp/in_flight_change.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SERVICES_UI_PUBLIC_CPP_IN_FLIGHT_CHANGE_H_
 #define SERVICES_UI_PUBLIC_CPP_IN_FLIGHT_CHANGE_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 14 matching lines @@
 
 class Window;
 class WindowTreeClient;
 
 enum class ChangeType {
   ADD_CHILD,
   ADD_TRANSIENT_WINDOW,
   BOUNDS,
   CAPTURE,
   DELETE_WINDOW,
+  DRAG_LOOP,
   FOCUS,
   MOVE_LOOP,
   NEW_TOP_LEVEL_WINDOW,
   NEW_WINDOW,
   OPACITY,
   PREDEFINED_CURSOR,
   PROPERTY,
   REMOVE_CHILD,
   REMOVE_TRANSIENT_WINDOW_FROM_PARENT,
   REORDER,
@@ skipping 92 matching lines @@
   // InFlightChange:
   void SetRevertValueFrom(const InFlightChange& change) override;
   void Revert() override;
 
  private:
   gfx::Rect revert_bounds_;
 
   DISALLOW_COPY_AND_ASSIGN(InFlightBoundsChange);
 };
 
-class InFlightMoveLoopChange : public InFlightChange {
+class InFlightDragChange : public InFlightChange {
  public:
-  explicit InFlightMoveLoopChange(Window* window);
+  InFlightDragChange(Window* window, ChangeType type);
 
   // InFlightChange:
   void SetRevertValueFrom(const InFlightChange& change) override;
   void Revert() override;
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(InFlightMoveLoopChange);
+  DISALLOW_COPY_AND_ASSIGN(InFlightDragChange);
 };
 
 // Inflight change that crashes on failure. This is useful for changes that are
 // expected to always complete.
 class CrashInFlightChange : public InFlightChange {
  public:
   CrashInFlightChange(Window* window, ChangeType type);
   ~CrashInFlightChange() override;
 
   // InFlightChange:
@@ skipping 135 matching lines @@
   void SetRevertValueFrom(const InFlightChange& change) override;
   void Revert() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(InFlightSetModalChange);
 };
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_PUBLIC_CPP_IN_FLIGHT_CHANGE_H_