Move all sources under atom/.

atom/browser/window_list_observer.h

@@ -0,0 +1,33 @@
+// Copyright (c) 2013 GitHub, Inc. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef ATOM_BROSER_WINDOW_LIST_OBSERVER_H_
+#define ATOM_BROSER_WINDOW_LIST_OBSERVER_H_
+
+namespace atom {
+
+class NativeWindow;
+
+class WindowListObserver {
+ public:
+  // Called immediately after a window is added to the list.
+  virtual void OnWindowAdded(NativeWindow* window) {}
+
+  // Called immediately after a window is removed from the list.
+  virtual void OnWindowRemoved(NativeWindow* window) {}
+
+  // Called when a window close is cancelled by beforeunload handler.
+  virtual void OnWindowCloseCancelled(NativeWindow* window) {}
+
+  // Called immediately after all windows are closed.
+  virtual void OnWindowAllClosed() {}
+
+ protected:
+  virtual ~WindowListObserver() {}
+};
+
+
+}  // namespace atom
+
+#endif  // ATOM_BROSER_WINDOW_LIST_OBSERVER_H_