[ash-md] Makes Wi-Fi header row sticky when network list is scrolled

ui/views/layout/box_layout.h

Index: ui/views/layout/box_layout.h
diff --git a/ui/views/layout/box_layout.h b/ui/views/layout/box_layout.h
index 9a87984d51f77cec0caa488860fa6dc1986f9e28..8507cb06fd655f9fd38f416100cbb7e9d2b66ff9 100644
--- a/ui/views/layout/box_layout.h
+++ b/ui/views/layout/box_layout.h
@@ -97,6 +97,24 @@ class VIEWS_EXPORT BoxLayout : public LayoutManager {
   // Sets the flex for views to use when none is specified.
   void SetDefaultFlex(int default_flex);
 
+  // Positions individual child.
+  void LayoutChild(View* child,
+                   const gfx::Rect& child_area,
+                   int main_free_space,
+                   int flex_sum,
+                   int* main_position,
+                   int* current_flex,
+                   int* total_padding);
+
+  // Positions all children. Can be overridden to change the visible order.
+  virtual void LayoutChildren(View* host,
+                              const gfx::Rect& child_area,
+                              int main_free_space,
+                              int flex_sum,
+                              int main_position,
+                              int current_flex,
+                              int* total_padding);
+
   // Overridden from views::LayoutManager:
   void Installed(View* host) override;
   void ViewRemoved(View* host, View* view) override;