Introduce new constructor to PlatformThread.

webrtc/logging/rtc_event_log/rtc_event_log_helper_thread.cc

Index: webrtc/logging/rtc_event_log/rtc_event_log_helper_thread.cc
diff --git a/webrtc/logging/rtc_event_log/rtc_event_log_helper_thread.cc b/webrtc/logging/rtc_event_log/rtc_event_log_helper_thread.cc
index e7edd9a93c07d86f40fe6be07a73872a91e2e01e..f8fda492236d78f1847f5c6d4dfc214732daf65c 100644
--- a/webrtc/logging/rtc_event_log/rtc_event_log_helper_thread.cc
+++ b/webrtc/logging/rtc_event_log/rtc_event_log_helper_thread.cc
@@ -307,10 +307,9 @@ void RtcEventLogHelperThread::ProcessEvents() {
   }
 }
 
-bool RtcEventLogHelperThread::ThreadOutputFunction(void* obj) {
+void RtcEventLogHelperThread::ThreadOutputFunction(void* obj) {
   RtcEventLogHelperThread* helper = static_cast<RtcEventLogHelperThread*>(obj);
   helper->ProcessEvents();
-  return false;
 }
 
 }  // namespace webrtc