Show small notification icons in notification tray

ash/common/system/tray/tray_background_view.cc

Index: ash/common/system/tray/tray_background_view.cc
diff --git a/ash/common/system/tray/tray_background_view.cc b/ash/common/system/tray/tray_background_view.cc
index 3e26c5069993d2872ef9ae0d0f4602002b223bb3..3c9e435a2ad8261ed58e4c47b1d5bcade03bd346 100644
--- a/ash/common/system/tray/tray_background_view.cc
+++ b/ash/common/system/tray/tray_background_view.cc
@@ -186,6 +186,10 @@ void TrayBackgroundView::TrayContainer::ChildPreferredSizeChanged(
   PreferredSizeChanged();
 }
 
+gfx::Insets TrayBackgroundView::TrayContainer::GetInsets() const {
+  return views::View::GetInsets() + insets_;

[xiyuan, 2016/08/05 16:18:59]

Can we use |insets_| and create a proper empty border in
TrayContainer::UpdateLayout instead?

[yoshiki, 2016/08/09 16:43:04]

Done.

+}
+
 void TrayBackgroundView::TrayContainer::ChildVisibilityChanged(View* child) {
   PreferredSizeChanged();
 }