Make spacing between uber tray items consistent with UI spec.

ash/system/power/tray_power.cc

Index: ash/system/power/tray_power.cc
diff --git a/ash/system/power/tray_power.cc b/ash/system/power/tray_power.cc
index 866964d57bbf6b2723b6334b85749651d1c239d3..a71e21131769b283db2b9d71ceacbdb7a9755d5e 100644
--- a/ash/system/power/tray_power.cc
+++ b/ash/system/power/tray_power.cc
@@ -9,6 +9,7 @@
 #include "ash/system/date/date_view.h"
 #include "ash/system/power/power_status_view.h"
 #include "ash/system/power/power_supply_status.h"
+#include "ash/system/tray/system_tray.h"
 #include "ash/system/tray/system_tray_delegate.h"
 #include "ash/system/tray/tray_constants.h"
 #include "ash/system/tray/tray_notification_view.h"
@@ -161,6 +162,8 @@ views::View* TrayPower::CreateTrayView(user::LoginStatus status) {
       ash::Shell::GetInstance()->tray_delegate()->GetPowerSupplyStatus();
   CHECK(power_tray_ == NULL);
   power_tray_ = new tray::PowerTrayView();
+  UpdateAfterShelfAlignmentChange(
+      ash::Shell::GetInstance()->system_tray()->shelf_alignment());
   power_tray_->UpdatePowerStatus(power_status);
   return power_tray_;
 }
@@ -198,6 +201,10 @@ void TrayPower::DestroyNotificationView() {
 void TrayPower::UpdateAfterLoginStatusChange(user::LoginStatus status) {
 }
 
+void TrayPower::UpdateAfterShelfAlignmentChange(ShelfAlignment alignment) {
+  SetTrayImageItemBorder(power_tray_, alignment);
+}
+
 void TrayPower::OnPowerStatusChanged(const PowerSupplyStatus& status) {
   if (power_tray_)
     power_tray_->UpdatePowerStatus(status);