Add a command line flag for dumping trace events to VLOG

base/debug/trace_event_impl.h

Index: base/debug/trace_event_impl.h
diff --git a/base/debug/trace_event_impl.h b/base/debug/trace_event_impl.h
index c0eead0b577a753a2fe3d02e2e4f1712d0691e7b..32cac0e190bdc78cb57f2d31f7baeb01b6aa71d9 100644
--- a/base/debug/trace_event_impl.h
+++ b/base/debug/trace_event_impl.h
@@ -278,7 +278,10 @@ class BASE_EXPORT TraceLog {
     RECORD_CONTINUOUSLY = 1 << 1,
 
     // Enable the sampling profiler.
-    ENABLE_SAMPLING = 1 << 2
+    ENABLE_SAMPLING = 1 << 2,
+
+    // Echo to stderr.
+    ECHO_TO_STDERR = 1 << 3
   };
 
   static TraceLog* GetInstance();
@@ -515,6 +518,8 @@ class BASE_EXPORT TraceLog {
   ObserverList<EnabledStateChangedObserver> enabled_state_observer_list_;
 
   base::hash_map<int, std::string> thread_names_;
+  base::hash_map<int, std::vector<TimeTicks> > thread_event_start_times_;

[danakj, 2013/04/24 20:10:12]

I think you're looking for std::stack for this instead of vector?

[Ian Vollick, 2013/04/24 22:57:11]

Done.

+  base::hash_map<std::string, int> thread_colors_;
 
   // XORed with TraceID to make it unlikely to collide with other processes.
   unsigned long long process_id_hash_;