Make it possible to share the embedder's dart sources for the vmservice

runtime/vm/service_isolate.cc

Index: runtime/vm/service_isolate.cc
diff --git a/runtime/vm/service_isolate.cc b/runtime/vm/service_isolate.cc
index a316c6ccc6c596db9fb503ada73f564447037ead..dcfc541befcbf68dad0ed0eb4349ee296faec1c1 100644
--- a/runtime/vm/service_isolate.cc
+++ b/runtime/vm/service_isolate.cc
@@ -78,6 +78,18 @@ intptr_t ServiceIsolate::exit_message_length_ = 0;
 Monitor* ServiceIsolate::monitor_ = NULL;
 bool ServiceIsolate::initializing_ = true;
 bool ServiceIsolate::shutting_down_ = false;
+char* ServiceIsolate::server_address_ = NULL;
+
+void ServiceIsolate::SetServerAddress(const char* address) {
+  if (server_address_ != NULL) {
+    free(server_address_);
+    server_address_ = NULL;
+  }
+  if (address == NULL) {
+    return;
+  }
+  server_address_ = strdup(address);
+}
 
 
 bool ServiceIsolate::NameEquals(const char* name) {
@@ -467,6 +479,10 @@ void ServiceIsolate::Shutdown() {
       ml.Wait();
     }
   }
+  if (server_address_ != NULL) {
+    free(server_address_);
+    server_address_ = NULL;
+  }
 }