base: Constantify thread_name() getter accessor.

base/tracked_objects.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 "base/tracked_objects.h"
 
 #include <math.h>
 #include <stdlib.h>
 
 #include "base/format_macros.h"
@@ skipping 534 matching lines @@
   if (!current_thread_data)
     return;
 
   int32 queue_duration = 0;
   int32 run_duration = 0;
   if (!start_of_run.is_null() && !end_of_run.is_null())
     run_duration = (end_of_run - start_of_run).InMilliseconds();
   current_thread_data->TallyADeath(*birth, queue_duration, run_duration);
 }
 
-const std::string ThreadData::thread_name() const { return thread_name_; }
-
 // static
 void ThreadData::SnapshotAllExecutedTasks(bool reset_max,
                                           ProcessDataSnapshot* process_data,
                                           BirthCountMap* birth_counts) {
   if (!kTrackAllTaskObjects)
     return;  // Not compiled in.
 
   // Get an unchanging copy of a ThreadData list.
   ThreadData* my_list = ThreadData::first();
 
@@ skipping 298 matching lines @@
     : process_id(base::GetCurrentProcId()) {
 #else
     : process_id(0) {
 #endif
 }
 
 ProcessDataSnapshot::~ProcessDataSnapshot() {
 }
 
 }  // namespace tracked_objects