Record Chrome trace events in tcmalloc heap profiles

base/debug/trace_event_impl.cc

Index: base/debug/trace_event_impl.cc
diff --git a/base/debug/trace_event_impl.cc b/base/debug/trace_event_impl.cc
index ae4fb1e129390e31552786c533fefcc94a7cdea2..f72adda3abf1f98948fd2ead42de523b7cb7f93f 100644
--- a/base/debug/trace_event_impl.cc
+++ b/base/debug/trace_event_impl.cc
@@ -1048,6 +1048,14 @@ void TraceLog::RemoveEnabledStateObserver(EnabledStateObserver* listener) {
     enabled_state_observer_list_.erase(it);
 }
 
+bool TraceLog::HasEnabledStateObserver(EnabledStateObserver* listener) const {
+  std::vector<EnabledStateObserver*>::const_iterator it =
+      std::find(enabled_state_observer_list_.begin(),
+                enabled_state_observer_list_.end(),
+                listener);
+  return it != enabled_state_observer_list_.end();
+}
+
 float TraceLog::GetBufferPercentFull() const {
   return (float)((double)logged_events_->Size()/(double)kTraceEventBufferSize);
 }
@@ -1072,6 +1080,8 @@ void TraceLog::SetEventCallback(EventCallback cb) {
 };
 
 void TraceLog::Flush(const TraceLog::OutputCallback& cb) {
+  // Ignore memory allocations from here down.
+  TRACE_MEMORY(TRACE_DISABLED_BY_DEFAULT("memory"), TRACE_MEMORY_IGNORE);
   scoped_ptr<TraceBuffer> previous_logged_events;
   {
     AutoLock lock(lock_);