Some more fixes to cros system tray icons (esp. screen tray items)

ash/common/system/chromeos/media_security/multi_profile_media_tray_item.cc

Index: ash/common/system/chromeos/media_security/multi_profile_media_tray_item.cc
diff --git a/ash/common/system/chromeos/media_security/multi_profile_media_tray_item.cc b/ash/common/system/chromeos/media_security/multi_profile_media_tray_item.cc
index 3f55b8bd1092048fdd5da4235cd074f42ebf3710..80ed25a2ab97b0320a81de113a54cc1ee5cb4011 100644
--- a/ash/common/system/chromeos/media_security/multi_profile_media_tray_item.cc
+++ b/ash/common/system/chromeos/media_security/multi_profile_media_tray_item.cc
@@ -25,11 +25,10 @@ class MultiProfileMediaTrayView : public TrayItemView,
   explicit MultiProfileMediaTrayView(SystemTrayItem* system_tray_item)
       : TrayItemView(system_tray_item) {
     SetLayoutManager(new views::FillLayout);
-    views::ImageView* icon = new views::ImageView;
+    CreateImageView();
     ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
-    icon->SetImage(
+    image_view()->SetImage(
         bundle.GetImageNamed(IDR_AURA_UBER_TRAY_RECORDING).ToImageSkia());
-    AddChildView(icon);
     OnMediaCaptureChanged();
     WmShell::Get()->system_tray_notifier()->AddMediaCaptureObserver(this);
     set_id(VIEW_ID_MEDIA_TRAY_VIEW);