Fix a typo that broke the posix build.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@1681 0039d316-1c4b-4281-b951-d872f2087c98

base/thread_local_posix.cc

@@ -24,7 +24,7 @@ void ThreadLocalPlatform::FreeSlot(SlotType& slot) {
 
 // static
 void* ThreadLocalPlatform::GetValueFromSlot(SlotType& slot) {
-  return pthread_getspecific(slot_);
+  return pthread_getspecific(slot);
 }
 
 // static