Make ThreadLocalStorage more posix pthread compliant

base/threading/thread_local_storage.h

Index: base/threading/thread_local_storage.h
===================================================================
--- base/threading/thread_local_storage.h	(revision 111452)
+++ base/threading/thread_local_storage.h	(working copy)
@@ -6,6 +6,7 @@
 #define BASE_THREADING_THREAD_LOCAL_STORAGE_H_
 #pragma once
 
+#include "base/atomicops.h"
 #include "base/base_export.h"
 #include "base/basictypes.h"
 
@@ -79,13 +80,15 @@
 
  private:
   // The maximum number of 'slots' in our thread local storage stack.
-  // For now, this is fixed.  We could either increase statically, or
-  // we could make it dynamic in the future.
   static const int kThreadLocalStorageSize = 64;
 
+  // The maximum number of times to try to clear slots by caling destructors.
+  // Use pthread naming convention for clarity.
+  static const int PTHREAD_DESTRUCTOR_ITERATIONS = kThreadLocalStorageSize;
+
   static long tls_key_;
   static long tls_max_;
-  static TLSDestructorFunc tls_destructors_[kThreadLocalStorageSize];
+  static subtle::AtomicWord tls_destructors_[kThreadLocalStorageSize];
 #endif  // OS_WIN
 
   DISALLOW_COPY_AND_ASSIGN(ThreadLocalStorage);