Send notification to users upon receiving sms messages

ash/common/shelf/shelf_widget.h

Index: ash/common/shelf/shelf_widget.h
diff --git a/ash/common/shelf/shelf_widget.h b/ash/common/shelf/shelf_widget.h
index 7225ccedaf08850275af592ab04d8e77003a7762..31daf1c60da8e553f81c56d642bbef7887fa691f 100644
--- a/ash/common/shelf/shelf_widget.h
+++ b/ash/common/shelf/shelf_widget.h
@@ -25,10 +25,15 @@ class AppListButton;
 class FocusCycler;
 class ShelfLayoutManager;
 class ShelfView;
+class SmsObserver;
 class StatusAreaWidget;
 class WmShelf;
 class WmWindow;
 
+namespace test {
+class SmsObserverTest;
+}
+
 // The ShelfWidget manages the shelf view (which contains the shelf icons) and
 // the status area widget. There is one ShelfWidget per display. It is created
 // early during RootWindowController initialization.
@@ -106,6 +111,7 @@ class ASH_EXPORT ShelfWidget : public views::Widget,
  private:
   class DelegateView;
   friend class DelegateView;
+  friend class ash::test::SmsObserverTest;
 
   WmShelf* wm_shelf_;
 
@@ -122,6 +128,8 @@ class ASH_EXPORT ShelfWidget : public views::Widget,
   // at the login screen.
   ShelfView* shelf_view_;
   ShelfBackgroundAnimator background_animator_;
+  // Owned by ShelfWidget.

[tdanderson, 2017/02/07 00:15:45]

nit: This comment is not needed in this case since the ownership is made clear
by the fact that you're using a unique_ptr.

[yiyix, 2017/02/07 22:03:22]

Done.

+  std::unique_ptr<SmsObserver> sms_observer_;
   bool activating_as_fallback_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfWidget);