First step at synchronizing client model changes with service.

mojo/services/public/cpp/view_manager/view_manager.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 MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_VIEW_MANAGER_H_
 #define MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_VIEW_MANAGER_H_
 
 #include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
 
 namespace mojo {
+class Shell;
 namespace services {
 namespace view_manager {
 
+class ViewManagerSynchronizer;
+
+// Approximately encapsulates the View Manager service.
+// Owns a synchronizer that keeps a client model in sync with the service.
+// Owned by the creator.
+//
+// TODO: displays
 class ViewManager {
  public:
+  explicit ViewManager(Shell* shell);
+  ~ViewManager();
+
  private:
+  friend class ViewManagerPrivate;
+
+  Shell* shell_;
+  scoped_ptr<ViewManagerSynchronizer> synchronizer_;
+
   DISALLOW_COPY_AND_ASSIGN(ViewManager);
 };
 
 }  // namespace view_manager
 }  // namespace services
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_VIEW_MANAGER_H_