Hide icons in message center on lock screen

ui/views/layout/grid_layout.h

Index: ui/views/layout/grid_layout.h
diff --git a/ui/views/layout/grid_layout.h b/ui/views/layout/grid_layout.h
index 144fac9830232ee2112dc0983216444594bec266..16a43040b98d96709782f3ebc58084af2e0732d2 100644
--- a/ui/views/layout/grid_layout.h
+++ b/ui/views/layout/grid_layout.h
@@ -132,6 +132,9 @@ class VIEWS_EXPORT GridLayout : public LayoutManager {
   // Starts a new row with the specified column set.
   void StartRow(float vertical_resize, int column_set_id);
 
+  // Starts a new row with the specified column set and height.
+  void StartRowWithHeight(float vertical_resize, int column_set_id, int height);
+
   // Advances past columns. Use this when the current column should not
   // contain any views.
   void SkipColumns(int col_count);