ash uber tray: Allow customizing each item depending on whether the user is logged in or not.

ash/system/audio/tray_volume.cc

Index: ash/system/audio/tray_volume.cc
diff --git a/ash/system/audio/tray_volume.cc b/ash/system/audio/tray_volume.cc
index 0bfa5bc732fc71b3db72b39179d60def77bf7070..bbf37f235dc482e505788d05ddf37863434e979d 100644
--- a/ash/system/audio/tray_volume.cc
+++ b/ash/system/audio/tray_volume.cc
@@ -148,16 +148,16 @@ TrayVolume::TrayVolume() {
 TrayVolume::~TrayVolume() {
 }
 
-views::View* TrayVolume::CreateTrayView() {
+views::View* TrayVolume::CreateTrayView(user::LoginStatus status) {
   return NULL;
 }
 
-views::View* TrayVolume::CreateDefaultView() {
+views::View* TrayVolume::CreateDefaultView(user::LoginStatus status) {
   volume_view_.reset(new tray::VolumeView);
   return volume_view_.get();
 }
 
-views::View* TrayVolume::CreateDetailedView() {
+views::View* TrayVolume::CreateDetailedView(user::LoginStatus status) {
   volume_view_.reset(new tray::VolumeView);
   return volume_view_.get();
 }