Reuse ThreadData instances associated with terminated named threads.

chrome/browser/task_profiler/task_profiler_data_serializer_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <string>
 
 #include "base/json/json_writer.h"
 #include "base/process/process_handle.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/tracked_objects.h"
@@ skipping 36 matching lines @@
   }
 
   {
     // Non-empty data.
     tracked_objects::ProcessDataPhaseSnapshot process_data_phase;
 
     tracked_objects::BirthOnThreadSnapshot parent;
     parent.location.file_name = "path/to/foo.cc";
     parent.location.function_name = "WhizBang";
     parent.location.line_number = 101;
-    parent.thread_name = "CrBrowserMain";
+    parent.sanitized_thread_name = "CrBrowserMain";
 
     tracked_objects::BirthOnThreadSnapshot child;
     child.location.file_name = "path/to/bar.cc";
     child.location.function_name = "FizzBoom";
     child.location.line_number = 433;
-    child.thread_name = "Chrome_IOThread";
-
+    child.sanitized_thread_name = "Chrome_IOThread";
 
     // Add a snapshot.
     process_data_phase.tasks.push_back(tracked_objects::TaskSnapshot());
     process_data_phase.tasks.back().birth = parent;
     process_data_phase.tasks.back().death_data.count = 37;
     process_data_phase.tasks.back().death_data.run_duration_max = 5;
     process_data_phase.tasks.back().death_data.run_duration_sample = 3;
     process_data_phase.tasks.back().death_data.run_duration_sum = 17;
     process_data_phase.tasks.back().death_data.queue_duration_max = 53;
     process_data_phase.tasks.back().death_data.queue_duration_sample = 13;
     process_data_phase.tasks.back().death_data.queue_duration_sum = 79;
     process_data_phase.tasks.back().death_data.alloc_ops = 127;
     process_data_phase.tasks.back().death_data.free_ops = 120;
     process_data_phase.tasks.back().death_data.allocated_bytes = 2013;
     process_data_phase.tasks.back().death_data.freed_bytes = 1092;
     process_data_phase.tasks.back().death_data.alloc_overhead_bytes = 201;
     process_data_phase.tasks.back().death_data.max_allocated_bytes = 1500;
-    process_data_phase.tasks.back().death_thread_name =
+    process_data_phase.tasks.back().death_sanitized_thread_name =
         "WorkerPool/-1340960768";
 
     // Add a second snapshot.
     process_data_phase.tasks.push_back(tracked_objects::TaskSnapshot());
     process_data_phase.tasks.back().birth = child;
     process_data_phase.tasks.back().death_data.count = 41;
     process_data_phase.tasks.back().death_data.run_duration_max = 205;
     process_data_phase.tasks.back().death_data.run_duration_sample = 203;
     process_data_phase.tasks.back().death_data.run_duration_sum = 2017;
     process_data_phase.tasks.back().death_data.queue_duration_max = 2053;
     process_data_phase.tasks.back().death_data.queue_duration_sample = 2013;
     process_data_phase.tasks.back().death_data.queue_duration_sum = 2079;
     process_data_phase.tasks.back().death_data.alloc_ops = 1207;
     process_data_phase.tasks.back().death_data.free_ops = 1200;
     process_data_phase.tasks.back().death_data.allocated_bytes = 20013;
     process_data_phase.tasks.back().death_data.freed_bytes = 10092;
     process_data_phase.tasks.back().death_data.alloc_overhead_bytes = 2001;
     process_data_phase.tasks.back().death_data.max_allocated_bytes = 15000;
-    process_data_phase.tasks.back().death_thread_name = "PAC thread #3";
+    process_data_phase.tasks.back().death_sanitized_thread_name =
+        "PAC thread #3";
 
     ExpectSerialization(process_data_phase, 239,
                         metrics::ProfilerEventProto::TrackedObject::RENDERER,
                         "{"
                         "\"list\":[{"
                         "\"birth_location\":{"
                         "\"file_name\":\"path/to/foo.cc\","
                         "\"function_name\":\"WhizBang\","
                         "\"line_number\":101"
                         "},"
@@ skipping 36 matching lines @@
                         "\"run_ms_max\":205,"
                         "\"run_ms_sample\":203"
                         "},"
                         "\"death_thread\":\"PAC thread #3\""
                         "}],"
                         "\"process_id\":239,"
                         "\"process_type\":\"Tab\""
                         "}");
   }
 }