mash: Migrate wallpaper controllers to ash/common.

ash/mus/window_manager.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 ASH_MUS_WINDOW_MANAGER_H_
 #define ASH_MUS_WINDOW_MANAGER_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <set>
 
 #include "base/macros.h"
+#include "base/memory/ref_counted.h"
 #include "base/observer_list.h"
 #include "services/ui/common/types.h"
 #include "services/ui/public/cpp/window_manager_delegate.h"
 #include "services/ui/public/cpp/window_observer.h"
 #include "services/ui/public/cpp/window_tree_client_delegate.h"
 #include "services/ui/public/interfaces/window_manager.mojom.h"
 
+namespace base {
+class SequencedWorkerPool;
+}
+
 namespace display {
 class Display;
 class ScreenBase;
 }
 
 namespace shell {
 class Connector;
 }
 
 namespace views {
@@ skipping 15 matching lines @@
 // WindowTreeClientDelegate for mash. WindowManager creates (and owns)
 // a RootWindowController per Display. WindowManager takes ownership of
 // the WindowTreeClient.
 class WindowManager : public ui::WindowManagerDelegate,
                       public ui::WindowObserver,
                       public ui::WindowTreeClientDelegate {
  public:
   explicit WindowManager(shell::Connector* connector);
   ~WindowManager() override;
 
-  void Init(std::unique_ptr<ui::WindowTreeClient> window_tree_client);
+  void Init(std::unique_ptr<ui::WindowTreeClient> window_tree_client,
+            const scoped_refptr<base::SequencedWorkerPool>& blocking_pool);
 
   WmShellMus* shell() { return shell_.get(); }
 
   ui::WindowTreeClient* window_tree_client() {
     return window_tree_client_.get();
   }
 
   ui::WindowManagerClient* window_manager_client() {
     return window_manager_client_;
   }
@@ skipping 83 matching lines @@
   std::map<uint16_t, AcceleratorHandler*> accelerator_handlers_;
   uint16_t next_accelerator_namespace_id_ = 0u;
 
   DISALLOW_COPY_AND_ASSIGN(WindowManager);
 };
 
 }  // namespace mus
 }  // namespace ash
 
 #endif  // ASH_MUS_WINDOW_MANAGER_H_