cros: Update charging not reliable battery status

ash/ash_strings.grd

Index: ash/ash_strings.grd
diff --git a/ash/ash_strings.grd b/ash/ash_strings.grd
index 72bb13b9dec1001469dd6056133ae3ec873cec67..4b97844fdee0dc69f35a8ae17f8d5032503fe8ac 100644
--- a/ash/ash_strings.grd
+++ b/ash/ash_strings.grd
@@ -417,7 +417,7 @@ Press Shift + Alt to switch.
         <ph name="hour">$1<ex>2</ex></ph>:<ph name="minute">$2<ex>53</ex></ph> until full
       </message>
       <message name="IDS_ASH_STATUS_TRAY_BATTERY_CHARGING_UNRELIABLE" desc="The label in the tray dialog to indicate that battery charging is unreliable.">
-        Charging not reliable
+        Low-power charger
       </message>
       <message name="IDS_ASH_STATUS_TRAY_BATTERY_FULL_CHARGE_ACCESSIBLE" desc="The message used by accessibility to show battery is full and charging.">
         Battery is full and charging.
@@ -441,7 +441,7 @@ Press Shift + Alt to switch.
         <ph name="hour">$1<ex> 1 hour</ex></ph> and <ph name="minute">$2<ex>15 minutes</ex></ph>
       </message>
       <message name="IDS_ASH_STATUS_TRAY_BATTERY_CHARGING_UNRELIABLE_ACCESSIBLE" desc="The message used by accessibility to indicate that battery charging is unreliable.">
-        Plugged in to a non-standard power supply. Battery charging may not be reliable.
+        Plugged in to a low-power charger. Battery charging may not be reliable.
       </message>
       <message name="IDS_ASH_STATUS_TRAY_HELP" desc="The accessible text for the help button.">
         Help