Bug 888552 - Use SET ps command to configure power save mode, r=vchang

dom/wifi/WifiWorker.js

@@ -507,10 +507,14 @@ var WifiManager = (function() {
     });
   }
 
-  function setPowerModeCommand(mode, callback) {
+  function setPowerModeCommandICS(mode, callback) {
     doBooleanCommand("DRIVER POWERMODE " + (mode === "AUTO" ? 0 : 1), "OK", callback);
   }
 
+  function setPowerModeCommandJB(mode, callback) {
+    doBooleanCommand("SET ps " + (mode === "AUTO" ? 1 : 0), "OK", callback);
+  }
+
   function getPowerModeCommand(callback) {
     doStringCommand("DRIVER GETPOWER", function(reply) {
       if (reply)
@@ -1508,7 +1512,9 @@ var WifiManager = (function() {
   manager.wpsPbc = wpsPbcCommand;
   manager.wpsPin = wpsPinCommand;
   manager.wpsCancel = wpsCancelCommand;
-  manager.setPowerMode = setPowerModeCommand;
+  manager.setPowerMode = (sdkVersion >= 16)
+                         ? setPowerModeCommandJB
+                         : setPowerModeCommandICS;
   manager.setSuspendOptimizations = setSuspendOptimizationsCommand;
   manager.setStaticIpMode = setStaticIpMode;
   manager.getRssiApprox = getRssiApproxCommand;