Added task to Observer methods

base/tracked.cc

Index: base/tracked.cc
diff --git a/base/tracked.cc b/base/tracked.cc
index 8ae7447adec3c8ec51280f0697ef01266103dc8e..767f072fdd6d25ef3b535dd089d4414378f4e261 100644
--- a/base/tracked.cc
+++ b/base/tracked.cc
@@ -65,6 +65,10 @@ void Location::WriteFunctionName(std::string* output) const {
 Tracked::Tracked() {}
 Tracked::~Tracked() {}
 void Tracked::SetBirthPlace(const Location& from_here) {}
+const Location Tracked::GetBirthPlace() const {
+  static Location kNone("NoFunctionName", "NeedToSetBirthPlace", -1);
+  return kNone;
+}
 bool Tracked::MissingBirthplace() const { return false; }
 void Tracked::ResetBirthTime() {}
 
@@ -96,6 +100,10 @@ void Tracked::SetBirthPlace(const Location& from_here) {
   tracked_births_ = current_thread_data->TallyABirth(from_here);
 }
 
+const Location Tracked::GetBirthPlace() const {
+  return tracked_births_->location();
+}
+
 void Tracked::ResetBirthTime() {
   tracked_birth_time_ = TimeTicks::Now();
 }