Convert path usage in NetworkListViewBase subclasses to use guids.

ash/common/system/chromeos/network/network_icon.h

Index: ash/common/system/chromeos/network/network_icon.h
diff --git a/ash/common/system/chromeos/network/network_icon.h b/ash/common/system/chromeos/network/network_icon.h
index 359acf3f73afb78f78737556e1075ebda131ad9e..b5824a05a38c45e1a2be9514004c7f9c26c39f7a 100644
--- a/ash/common/system/chromeos/network/network_icon.h
+++ b/ash/common/system/chromeos/network/network_icon.h
@@ -26,9 +26,9 @@ enum IconType {
   ICON_TYPE_MENU_LIST,     // dark icons without VPN badges; separate status
 };
 
-// Gets the image for the network associated with |service_path|. |network| must
-// not be NULL. |icon_type| determines the color theme and whether or not to
-// show the VPN badge. This caches badged icons per network per |icon_type|.
+// Gets the image for provided |network|. |network| must not be NULL.
+// |icon_type| determines the color theme and whether or not to show the VPN
+// badge. This caches badged icons per network per |icon_type|.
 ASH_EXPORT gfx::ImageSkia GetImageForNetwork(
     const chromeos::NetworkState* network,
     IconType icon_type);