Switch from the benighted PlatformThread to the shiny SimpleThread

base/stats_table.cc

 // Copyright (c) 2006-2008 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/stats_table.h"
 
 #include "base/logging.h"
 #include "base/platform_thread.h"
 #include "base/process_util.h"
 #include "base/shared_memory.h"
@@ skipping 327 matching lines @@
   // Mark the slot free by zeroing out the thread name.
   wchar_t* name = impl_->thread_name(data->slot);
   *name = L'\0';
 
   // Remove the calling thread's TLS so that it cannot use the slot.
   tls_index_.Set(NULL);
   delete data;
 }
 
 void StatsTable::SlotReturnFunction(void* data) {
+  // This is called by the TLS destructor, which on some platforms has 
+  // already cleared the TLS info, so use the tls_data argument
+  // rather than trying to fetch it ourselves.
   StatsTableTLSData* tls_data = static_cast<StatsTableTLSData*>(data);
   if (tls_data) {
     DCHECK(tls_data->table);
     tls_data->table->UnregisterThread(tls_data);
   }
 }
 
 int StatsTable::CountThreadsRegistered() const {
   if (!impl_)
     return 0;
@@ skipping 188 matching lines @@
       return NULL;
 
   // Find the counter id for the counter.
   std::wstring str_name(name);
   int counter = table->FindCounter(str_name);
 
   // Now we can find the location in the table.
   return table->GetLocation(counter, slot);
 }