Enable TCMalloc.

webkit/build/JavaScriptCore/pthread.h

 // 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.
 
 #ifndef CHROME_WEBKIT_BUILD_JAVASCRIPTCORE_PTHREAD_H__
 #define CHROME_WEBKIT_BUILD_JAVASCRIPTCORE_PTHREAD_H__
 
 #include <errno.h>
 #include "wtf/Assertions.h"
 
@@ skipping 58 matching lines @@
 inline int pthread_cond_wait(pthread_cond_t *, pthread_mutex_t *) {
   return 0;
 }
 inline int pthread_cond_signal(pthread_cond_t *) {
   return 0;
 }
 inline int pthread_cond_broadcast(pthread_cond_t *) {
   return 0;
 }
 
+// ----------------------------------------------------------------------------
+// pthread_key_t
+
+typedef int pthread_key_t;
+
+void pthread_setspecific(pthread_key_t key, void* value) {
+  TlsSetValue(key, value);
+}
+
+void pthread_key_create(pthread_key_t* key, void* destructor) {
+  // TODO(mbelshe): hook up the per-thread destructor.
+  *key = TlsAlloc();
+}
+
 
 #endif  // CHROME_WEBKIT_BUILD_JAVASCRIPTCORE_PTHREAD_H__