mus: Let clients set the cursor of their window.

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

 // 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.
 
 #include "components/mus/public/cpp/lib/in_flight_change.h"
 
 #include "components/mus/public/cpp/lib/window_private.h"
 #include "components/mus/public/cpp/window_tree_connection.h"
 
 namespace mus {
@@ skipping 67 matching lines @@
 void InFlightPropertyChange::SetRevertValueFrom(const InFlightChange& change) {
   revert_value_ =
       static_cast<const InFlightPropertyChange&>(change).revert_value_.Clone();
 }
 
 void InFlightPropertyChange::Revert() {
   WindowPrivate(window())
       .LocalSetSharedProperty(property_name_, revert_value_.Pass());
 }
 
+// InFlightPredefinedCursorChange ---------------------------------------------
+
+InFlightPredefinedCursorChange::InFlightPredefinedCursorChange(
+    Window* window,
+    mojom::Cursor revert_value)
+    : InFlightChange(window, ChangeType::PREDEFINED_CURSOR),
+      revert_cursor_(revert_value) {}
+
+InFlightPredefinedCursorChange::~InFlightPredefinedCursorChange() {}
+
+bool InFlightPredefinedCursorChange::Matches(
+    const InFlightChange& change) const {
+  return static_cast<const InFlightPredefinedCursorChange&>(change)

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

You shouldn't need to override Matches. The reason Matches is virtual is if the
type is not enough. That isn't the case for cursors as each window only has one
cursor.

+             .revert_cursor_ == revert_cursor_;
+}
+
+void InFlightPredefinedCursorChange::SetRevertValueFrom(
+    const InFlightChange& change) {
+  revert_cursor_ =
+      static_cast<const InFlightPredefinedCursorChange&>(change).revert_cursor_;
+}
+
+void InFlightPredefinedCursorChange::Revert() {
+  WindowPrivate(window()).LocalSetPredefinedCursor(revert_cursor_);
+}
+
 }  // namespace mus