Remove ThreadObj #define and kThreadMaxNameLength from thread_wrapper.

BUG=
R=hbos@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/47679004

Cr-Commit-Position: refs/heads/master@{#8792}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8792 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/system_wrappers/source/thread.cc b/webrtc/system_wrappers/source/thread.cc
index 8d3fb40..1dcf8f3 100644
--- a/webrtc/system_wrappers/source/thread.cc
+++ b/webrtc/system_wrappers/source/thread.cc
@@ -19,7 +19,7 @@
 namespace webrtc {
 
 ThreadWrapper* ThreadWrapper::CreateThread(ThreadRunFunction func,
-                                           ThreadObj obj, ThreadPriority prio,
+                                           void* obj, ThreadPriority prio,
                                            const char* thread_name) {
 #if defined(_WIN32)
   return new ThreadWindows(func, obj, prio, thread_name);