Implement the spring charger replacement UI.

ash/system/chromeos/power/power_status.h

Index: ash/system/chromeos/power/power_status.h
diff --git a/ash/system/chromeos/power/power_status.h b/ash/system/chromeos/power/power_status.h
index 3ac2de9b2110080e1969fc6b809a0a03763cba7c..e306049640172516e82cc513fa356addb2b86e1e 100644
--- a/ash/system/chromeos/power/power_status.h
+++ b/ash/system/chromeos/power/power_status.h
@@ -123,6 +123,9 @@ class ASH_EXPORT PowerStatus : public chromeos::PowerManagerClient::Observer {
   // charging rate) is connected.
   bool IsUsbChargerConnected() const;
 
+  // Returns true if an original spring charger is connected.
+  bool IsOriginalSpringChargerConnected() const;
+
   // Returns the image that should be shown for the battery's current state.
   gfx::ImageSkia GetBatteryImage(IconSet icon_set) const;