Fix Dartium build.

runtime/bin/vmservice_dartium.cc

Index: runtime/bin/vmservice_dartium.cc
diff --git a/runtime/bin/vmservice_dartium.cc b/runtime/bin/vmservice_dartium.cc
index 8883ccd43c0c9bbd936f9a3f47ae4b5e1d3fa9a3..c0e6f789c17acb02547d9e9271597350ecdf6ca2 100644
--- a/runtime/bin/vmservice_dartium.cc
+++ b/runtime/bin/vmservice_dartium.cc
@@ -60,7 +60,8 @@ Dart_Isolate VmServiceServer::CreateIsolate(const uint8_t* snapshot_buffer) {
   ASSERT(Dart_IsServiceIsolate(isolate));
   if (!VmService::Setup(
           DEFAULT_VM_SERVICE_SERVER_IP, DEFAULT_VM_SERVICE_SERVER_PORT,
-          false /* running_precompiled */, false /* disable origin checks */)) {
+          false /* running_precompiled */, false /* disable origin checks */,
+          false /* trace_loading */)) {
     fprintf(stderr, "Vmservice::Setup failed: %s\n",
             VmService::GetErrorMessage());
     isolate = NULL;