Reuse ThreadData instances associated with terminated named threads.

chrome/browser/task_profiler/task_profiler_data_serializer.cc

Index: chrome/browser/task_profiler/task_profiler_data_serializer.cc
diff --git a/chrome/browser/task_profiler/task_profiler_data_serializer.cc b/chrome/browser/task_profiler/task_profiler_data_serializer.cc
index 5d5e851428a788bf427c2fb13f0596bdb9bfa870..6f4b52ee948b7368ac23902116ec48cea5d14bb9 100644
--- a/chrome/browser/task_profiler/task_profiler_data_serializer.cc
+++ b/chrome/browser/task_profiler/task_profiler_data_serializer.cc
@@ -51,7 +51,8 @@ void BirthOnThreadSnapshotToValue(const BirthOnThreadSnapshot& birth,
   LocationSnapshotToValue(birth.location, location_value.get());
   dictionary->Set(prefix + "_location", location_value.release());
 
-  dictionary->Set(prefix + "_thread", new base::StringValue(birth.thread_name));
+  dictionary->Set(prefix + "_thread",
+                  new base::StringValue(birth.sanitized_thread_name));
 }
 
 // Re-serializes the |death_data| into |dictionary|.
@@ -83,7 +84,7 @@ void TaskSnapshotToValue(const TaskSnapshot& snapshot,
   DeathDataSnapshotToValue(snapshot.death_data, death_data.get());
   dictionary->Set("death_data", death_data.release());
 
-  dictionary->SetString("death_thread", snapshot.death_thread_name);
+  dictionary->SetString("death_thread", snapshot.death_sanitized_thread_name);
 }
 
 int AsChromeProcessType(