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 111815)
+++ base/threading/thread_local_storage.h	(working copy)
@@ -77,16 +77,9 @@
   // Function to lazily initialize our thread local storage.
   static void **Initialize();
 
- 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;
-
   static long tls_key_;
   static long tls_max_;
-  static TLSDestructorFunc tls_destructors_[kThreadLocalStorageSize];
-#endif  // OS_WIN
+  #endif  // OS_WIN
 
   DISALLOW_COPY_AND_ASSIGN(ThreadLocalStorage);
 };