memory-infra: Start disentangling tracing from memory-infra

base/trace_event/trace_log.cc

Index: base/trace_event/trace_log.cc
diff --git a/base/trace_event/trace_log.cc b/base/trace_event/trace_log.cc
index 07d124c4fe46f7a169b1a5243cb3b71e8e122110..ee97b959f2654f58998684b27cde135be5dcdc4a 100644
--- a/base/trace_event/trace_log.cc
+++ b/base/trace_event/trace_log.cc
@@ -755,6 +755,10 @@ void TraceLog::SetDisabledWhileLocked(uint8_t modes_to_disable) {
   dispatching_to_observer_list_ = false;
 }
 
+bool TraceLog::IsEnabled() {
+  return enabled_modes_ & RECORDING_MODE;
+}

[hjd, 2017/04/13 14:16:59]

Can't be inline if IsEnabled is virtual.

+
 int TraceLog::GetNumTracesRecorded() {
   AutoLock lock(lock_);
   if (!IsEnabled())