Allow root level requests in the vm service.

runtime/vm/json_stream.cc

Index: runtime/vm/json_stream.cc
===================================================================
--- runtime/vm/json_stream.cc	(revision 31848)
+++ runtime/vm/json_stream.cc	(working copy)
@@ -10,13 +10,15 @@
 
 namespace dart {
 
-JSONStream::JSONStream(intptr_t buf_size) : buffer_(buf_size) {
-  open_objects_ = 0;
-  arguments_ = NULL;
-  num_arguments_ = 0;
-  option_keys_ = NULL;
-  option_values_ = NULL;
-  num_options_ = 0;
+JSONStream::JSONStream(intptr_t buf_size)
+    : open_objects_(0),
+      buffer_(buf_size),
+      reply_port_(ILLEGAL_PORT),
+      arguments_(NULL),
+      num_arguments_(0),
+      option_keys_(NULL),
+      option_values_(NULL),
+      num_options_(0) {
 }
 
 
@@ -181,6 +183,11 @@
 }
 
 
+void JSONStream::set_reply_port(Dart_Port port) {
+  reply_port_ = port;
+}
+
+
 void JSONStream::SetArguments(const char** arguments, intptr_t num_arguments) {
   arguments_ = arguments;
   num_arguments_ = num_arguments;