Show avatar icon on V2 app's frame

ash/frame/custom_frame_view_ash.h

Index: ash/frame/custom_frame_view_ash.h
diff --git a/ash/frame/custom_frame_view_ash.h b/ash/frame/custom_frame_view_ash.h
index 9a87e71b090ab90a764342baf21c3a79f7ddd31b..bfa6729e7b5dd190b23a80164eebfe634e4c56b3 100644
--- a/ash/frame/custom_frame_view_ash.h
+++ b/ash/frame/custom_frame_view_ash.h
@@ -11,7 +11,6 @@
 
 namespace ash {
 class FrameBorderHitTestController;
-class HeaderPainter;
 class ImmersiveFullscreenController;
 }
 namespace views {
@@ -59,10 +58,14 @@ class ASH_EXPORT CustomFrameViewAsh : public views::NonClientFrameView {
   virtual gfx::Size GetMaximumSize() OVERRIDE;
   virtual void SchedulePaintInRect(const gfx::Rect& r) OVERRIDE;
   virtual bool HitTestRect(const gfx::Rect& rect) const OVERRIDE;
+  virtual void VisibilityChanged(views::View* starting_from,
+                                 bool is_visible) OVERRIDE;
 
   // Get the view of the header.
   views::View* GetHeaderView();
 
+  const views::View* GetAvatarIconViewForTest() const;
+
  private:
   class OverlayView;
   friend class TestWidgetConstraintsDelegate;