Add 'quit' and 'window-all-closed' events for app module.

browser/browser_observer.h

@@ -0,0 +1,25 @@
+// 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_BROWSER_OBSERVER_H_
+#define ATOM_BROSER_BROWSER_OBSERVER_H_
+
+namespace atom {
+
+class BrowserObserver {
+ public:
+  // The browser has closed all windows and will quit.
+  virtual void OnWillQuit(bool* prevent_default) {}
+
+  // The browser has closed all windows. If the browser is quiting, then this
+  // method will not be called, instead it will call OnWillQuit.
+  virtual void OnWindowAllClosed() {}
+
+ protected:
+  virtual ~BrowserObserver() {}
+};
+
+}  // namespace atom
+
+#endif  // ATOM_BROSER_BROWSER_OBSERVER_H_