Finish moving service protocol to json rpc.

runtime/vm/service/vmservice.dart

Index: runtime/vm/service/vmservice.dart
diff --git a/runtime/vm/service/vmservice.dart b/runtime/vm/service/vmservice.dart
index 3c5ed243ff6a8cf1cc4dd9e79114ecbe9fef38ef..d4eca93ddb6b64c4580bf25cc0dc520b12e50445 100644
--- a/runtime/vm/service/vmservice.dart
+++ b/runtime/vm/service/vmservice.dart
@@ -138,18 +138,13 @@ class VMService extends MessageRouter {
     if (message.completed) {
       return message.response;
     }
+    // TODO(turnidge): Update to json rpc.  BEFORE SUBMIT.
     if ((message.path.length == 1) && (message.path[0] == 'clients')) {
       _clientCollection(message);
       return message.response;
     }
-    if (message.isOld) {
-      if (message.path[0] == 'isolates') {
-        return runningIsolates.route(message);
-      }
-    } else {
-      if (message.params['isolate'] != null) {
-        return runningIsolates.route(message);
-      }
+    if (message.params['isolateId'] != null) {
+      return runningIsolates.route(message);
     }
     return message.sendToVM();
   }