cros: Show notification when low-power charger connected

ash/ash_chromeos_strings.grdp

Index: ash/ash_chromeos_strings.grdp
diff --git a/ash/ash_chromeos_strings.grdp b/ash/ash_chromeos_strings.grdp
index 1e996435a4103ad80c13f191c16e450fbd8a44ff..6fc527db7943ed8c0c658b912de6f2bba5d1547f 100644
--- a/ash/ash_chromeos_strings.grdp
+++ b/ash/ash_chromeos_strings.grdp
@@ -3,6 +3,17 @@
      Everything in this file is wrapped in <if expr="pp_ifdef('chromeos')">. -->
 <grit-part>
 
+  <!-- Status tray charging strings. -->
+  <message name="IDS_ASH_STATUS_TRAY_LOW_POWER_CHARGER_TITLE" desc="The title of a notification indicating that a low-current USB charger has been connected.">
+    Low-power charger connected
+  </message>
+  <message name="IDS_ASH_STATUS_TRAY_LOW_POWER_CHARGER_MESSAGE" desc="The message body of a notification indicating that a low-current USB charger has been connected.">
+    Your Chromebook may not charge while it is turned on. Consider using the official charger.
+  </message>
+  <message name="IDS_ASH_STATUS_TRAY_LOW_POWER_CHARGER_SOURCE" desc="The source of the notification indicating that a low-current USB charger has been connected. Part of a menu item that allows this notification to be turned off.">
+    USB charger
+  </message>
+  
   <!-- Status Tray Network strings -->
   <message name="IDS_ASH_STATUS_TRAY_NETWORK" desc="The label used in the network dialog header.">
     Network