Remove redundant parameter to modifyRoute

modifyRoute takes both an interface name and a LinkProperties.
This is redundant because all callers get the interface name
from the LinkProperties. Make modifyRoute get the interface
name from the LinkProperties instead.

Change-Id: I41ba8e0a10241c2f1107204fcaca2be74556042b
diff --git a/services/java/com/android/server/ConnectivityService.java b/services/java/com/android/server/ConnectivityService.java
index 027f0f3..c83a919 100644
--- a/services/java/com/android/server/ConnectivityService.java
+++ b/services/java/com/android/server/ConnectivityService.java
@@ -1413,11 +1413,11 @@
     }
 
     private boolean addRoute(LinkProperties p, RouteInfo r, boolean toDefaultTable) {
-        return modifyRoute(p.getInterfaceName(), p, r, 0, ADD, toDefaultTable);
+        return modifyRoute(p, r, 0, ADD, toDefaultTable);
     }
 
     private boolean removeRoute(LinkProperties p, RouteInfo r, boolean toDefaultTable) {
-        return modifyRoute(p.getInterfaceName(), p, r, 0, REMOVE, toDefaultTable);
+        return modifyRoute(p, r, 0, REMOVE, toDefaultTable);
     }
 
     private boolean addRouteToAddress(LinkProperties lp, InetAddress addr) {
@@ -1444,11 +1444,12 @@
                 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface);
             }
         }
-        return modifyRoute(lp.getInterfaceName(), lp, bestRoute, 0, doAdd, toDefaultTable);
+        return modifyRoute(lp, bestRoute, 0, doAdd, toDefaultTable);
     }
 
-    private boolean modifyRoute(String ifaceName, LinkProperties lp, RouteInfo r, int cycleCount,
-            boolean doAdd, boolean toDefaultTable) {
+    private boolean modifyRoute(LinkProperties lp, RouteInfo r, int cycleCount, boolean doAdd,
+            boolean toDefaultTable) {
+        String ifaceName = lp.getInterfaceName();
         if ((ifaceName == null) || (lp == null) || (r == null)) {
             if (DBG) log("modifyRoute got unexpected null: " + ifaceName + ", " + lp + ", " + r);
             return false;
@@ -1472,7 +1473,7 @@
                                                         bestRoute.getGateway(),
                                                         ifaceName);
                 }
-                modifyRoute(ifaceName, lp, bestRoute, cycleCount+1, doAdd, toDefaultTable);
+                modifyRoute(lp, bestRoute, cycleCount+1, doAdd, toDefaultTable);
             }
         }
         if (doAdd) {