Add an explicit way of making IDs local or global

base/test/trace_event_analyzer.h

Index: base/test/trace_event_analyzer.h
diff --git a/base/test/trace_event_analyzer.h b/base/test/trace_event_analyzer.h
index 0e2366bbb19c8e89b2bc91526dc4e2f013e47907..41944b07900ac82430e06a8ec3bebb7c54db7557 100644
--- a/base/test/trace_event_analyzer.h
+++ b/base/test/trace_event_analyzer.h
@@ -165,6 +165,8 @@ struct TraceEvent {
   std::string category;
   std::string name;
   std::string id;
+  std::string local_id;
+  std::string global_id;
 
   // All numbers and bool values from TraceEvent args are cast to double.
   // bool becomes 1.0 (true) or 0.0 (false).