mus: Let clients set the cursor of their window.

components/mus/public/cpp/lib/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 COMPONENTS_MUS_PUBLIC_CPP_LIB_IN_FLIGHT_CHANGE_H_
 #define COMPONENTS_MUS_PUBLIC_CPP_LIB_IN_FLIGHT_CHANGE_H_
 
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "mojo/public/cpp/bindings/array.h"
 #include "ui/gfx/geometry/rect.h"
 
 namespace mus {
 
+namespace mojom {
+enum Cursor : int32_t;
+}
+
 class Window;
 
 enum class ChangeType {
   ADD_TRANSIENT_WINDOW,
   BOUNDS,
   DELETE_WINDOW,
   NEW_WINDOW,
   PROPERTY,
-  REMOVE_TRANSIENT_WINDOW_FROM_PARENT
+  REMOVE_TRANSIENT_WINDOW_FROM_PARENT,
+  PREDEFINED_CURSOR

[sky, 2015/12/02 21:42:35]

nit: keep sorted.

 };
 
 // InFlightChange is used to track function calls to the server and take the
 // appropriate action when the call fails, or the same property changes while
 // waiting for the response. When a function is called on the server an
 // InFlightChange is created. The function call is complete when
 // OnChangeCompleted() is received from the server. The following may occur
 // while waiting for a response:
 // . A new value is encountered from the server. For example, the bounds of
 //   a window is locally changed and while waiting for the ack
@@ skipping 86 matching lines @@
   void SetRevertValueFrom(const InFlightChange& change) override;
   void Revert() override;
 
  private:
   const std::string property_name_;
   mojo::Array<uint8_t> revert_value_;
 
   DISALLOW_COPY_AND_ASSIGN(InFlightPropertyChange);
 };
 
+class InFlightPredefinedCursorChange : public InFlightChange {
+ public:
+  InFlightPredefinedCursorChange(Window* window, mojom::Cursor revert_value);
+  ~InFlightPredefinedCursorChange() override;
+
+  // InFlightChange:
+  bool Matches(const InFlightChange& change) const override;
+  void SetRevertValueFrom(const InFlightChange& change) override;
+  void Revert() override;
+
+ private:
+  mojom::Cursor revert_cursor_;
+
+  DISALLOW_COPY_AND_ASSIGN(InFlightPredefinedCursorChange);
+};
+
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_PUBLIC_CPP_LIB_IN_FLIGHT_CHANGE_H_