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..3e6140e7786ad0ff3f10cb4644acc8db97de27f8 100644
--- a/ash/system/tray/system_tray.cc
+++ b/ash/system/tray/system_tray.cc
@@ -402,6 +402,13 @@ void SystemTray::DestroyNotificationBubble() {
   }
 }
 
+base::string16 SystemTray::GetAccessibleNameForTray() {
+  base::string16 time = GetAccessibleTimeString(base::Time::Now());
+  base::string16 battery = PowerStatus::Get()->GetAccessibleNameString(false);
+  return l10n_util::GetStringFUTF16(
+      IDS_ASH_STATUS_TRAY_ACCESSIBLE_DESCRIPTION, time, battery);
+}
+
 int SystemTray::GetTrayXOffset(SystemTrayItem* item) const {
   // Don't attempt to align the arrow if the shelf is on the left or right.
   if (shelf_alignment() != SHELF_ALIGNMENT_BOTTOM &&
@@ -588,6 +595,14 @@ 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;
@@ -615,10 +630,6 @@ void SystemTray::AnchorUpdated() {
   }
 }
 
-base::string16 SystemTray::GetAccessibleNameForTray() {
-  return l10n_util::GetStringUTF16(IDS_ASH_STATUS_TRAY_ACCESSIBLE_NAME);
-}
-
 void SystemTray::BubbleResized(const TrayBubbleView* bubble_view) {
   UpdateWebNotifications();
 }