Make WindowTree::SetModal() take the type.

ui/aura/mus/window_tree_client.h

 // Copyright 2014 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 UI_AURA_MUS_WINDOW_TREE_CLIENT_H_
 #define UI_AURA_MUS_WINDOW_TREE_CLIENT_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 215 matching lines @@
   void SetWindowTree(ui::mojom::WindowTreePtr window_tree_ptr);
 
   // Called when the connection to the server is established.
   void WindowTreeConnectionEstablished(ui::mojom::WindowTree* window_tree);
 
   // Called when the ui::mojom::WindowTree connection is lost, deletes this.
   void OnConnectionLost();
 
   // Called when a Window property changes. If |key| is handled internally
   // (maps to a function on WindowTree) returns true.
-  bool HandleInternalPropertyChanged(WindowMus* window, const void* key);
+  bool HandleInternalPropertyChanged(WindowMus* window,
+                                     const void* key,
+                                     int64_t old_value);
 
   // OnEmbed() calls into this. Exposed as a separate function for testing.
   void OnEmbedImpl(ui::mojom::WindowTree* window_tree,
                    ClientSpecificId client_id,
                    ui::mojom::WindowDataPtr root_data,
                    int64_t display_id,
                    Id focused_window_id,
                    bool drawn);
 
   // Called by WmNewDisplayAdded().
@@ skipping 27 matching lines @@
   void OnWindowMusRemoveChild(WindowMus* parent, WindowMus* child);
   void OnWindowMusMoveChild(WindowMus* parent,
                             size_t current_index,
                             size_t dest_index);
   void OnWindowMusSetVisible(WindowMus* window, bool visible);
   std::unique_ptr<ui::PropertyData> OnWindowMusWillChangeProperty(
       WindowMus* window,
       const void* key);
   void OnWindowMusPropertyChanged(WindowMus* window,
                                   const void* key,
+                                  int64_t old_value,
                                   std::unique_ptr<ui::PropertyData> data);
 
   // Callback passed from WmPerformMoveLoop().
   void OnWmMoveLoopCompleted(uint32_t change_id, bool completed);
 
   // Overridden from WindowTreeClient:
   void OnEmbed(ClientSpecificId client_id,
                ui::mojom::WindowDataPtr root,
                ui::mojom::WindowTreePtr tree,
                int64_t display_id,
@@ skipping 251 matching lines @@
   // ContextFactory that was set on Env originally.
   ui::ContextFactory* initial_context_factory_ = nullptr;
   base::WeakPtrFactory<WindowTreeClient> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowTreeClient);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_MUS_WINDOW_TREE_CLIENT_H_