Use VM tag in profile and add stack trace trie

runtime/vm/service.cc

Index: runtime/vm/service.cc
diff --git a/runtime/vm/service.cc b/runtime/vm/service.cc
index 8907dc3dc1ac98af485de9c28d17df01d0974f03..89d50158fee17db67ce9fd8d03141529b1db0549 100644
--- a/runtime/vm/service.cc
+++ b/runtime/vm/service.cc
@@ -1374,7 +1374,12 @@ static bool HandleProfile(Isolate* isolate, JSONStream* js) {
   // A full profile includes disassembly of all Dart code objects.
   // TODO(johnmccutchan): Add sub command to trigger full code dump.
   bool full_profile = false;
-  Profiler::PrintToJSONStream(isolate, js, full_profile);
+  const char* tags_option = js->LookupOption("tags");
+  bool use_tags = true;
+  if ((tags_option != NULL) && (strcmp("hide", tags_option) == 0)) {
+    use_tags = false;
+  }
+  Profiler::PrintToJSONStream(isolate, js, full_profile, use_tags);
   return true;
 }