Revert "Delete the ViewManager and WindowManager services."

mojo/services/view_manager/cpp/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_VIEW_MANAGER_CPP_VIEW_MANAGER_H_
+#define MOJO_SERVICES_VIEW_MANAGER_CPP_VIEW_MANAGER_H_
+
+#include <string>
+
+#include "view_manager/cpp/types.h"
+
+namespace mojo {
+class View;
+
+// Encapsulates a connection to the view manager service. A unique connection
+// is made every time an app is embedded.
+class ViewManager {
+ public:
+  // Returns the URL of the application that embedded this application.
+  virtual const std::string& GetEmbedderURL() const = 0;
+
+  // Returns the root of this connection.
+  virtual View* GetRoot() = 0;
+
+  // Returns a View known to this connection.
+  virtual View* GetViewById(Id id) = 0;
+
+  // Returns the focused view; null if focus is not yet known or another app is
+  // focused.
+  virtual View* GetFocusedView() = 0;
+
+  // Creates and returns a new View (which is owned by the ViewManager). Views
+  // are initially hidden, use SetVisible(true) to show.
+  virtual View* CreateView() = 0;
+
+ protected:
+  virtual ~ViewManager() {}
+};
+
+}  // namespace mojo
+
+#endif  // MOJO_SERVICES_VIEW_MANAGER_CPP_VIEW_MANAGER_H_