Added battery level and time to the status tray's accessible name.

ash/system/tray/system_tray.cc

Index: ash/system/tray/system_tray.cc
diff --git a/ash/system/tray/system_tray.cc b/ash/system/tray/system_tray.cc
index 5c6af2ce30da634886aa8cbdad624d3e1522a86f..640a3db424c145694db3f0226593e49940531055 100644
--- a/ash/system/tray/system_tray.cc
+++ b/ash/system/tray/system_tray.cc
@@ -588,6 +588,14 @@ void SystemTray::UpdateWebNotifications() {
   status_area_widget()->web_notification_tray()->SetSystemTrayHeight(height);
 }
 
+base::string16 SystemTray::GetAccessibleTimeString(
+    const base::Time& now) const {
+  base::HourClockType hour_type =
+      ash::Shell::GetInstance()->system_tray_delegate()->GetHourClockType();
+  return base::TimeFormatTimeOfDayWithHourClockType(
+      now, hour_type, base::kKeepAmPm);
+}
+
 void SystemTray::SetShelfAlignment(ShelfAlignment alignment) {
   if (alignment == shelf_alignment())
     return;
@@ -616,7 +624,10 @@ void SystemTray::AnchorUpdated() {
 }
 
 base::string16 SystemTray::GetAccessibleNameForTray() {
-  return l10n_util::GetStringUTF16(IDS_ASH_STATUS_TRAY_ACCESSIBLE_NAME);
+  base::string16 time = GetAccessibleTimeString(base::Time::Now());
+  base::string16 battery = PowerStatus::Get()->GetShortAccessibleNameString();
+  return l10n_util::GetStringFUTF16(
+      IDS_ASH_STATUS_TRAY_ACCESSIBLE_DESCRIPTION, time, battery);
 }
 
 void SystemTray::BubbleResized(const TrayBubbleView* bubble_view) {