Use ThreadPtr in CPUThreadPoolExecutor to match the declaration

Summary: Because it makes Visual Studio's intellisense happier, and it's always better to match exactly, rather than matching implicitly.

Reviewed By: yfeldblum

Differential Revision: D7821865

fbshipit-source-id: 9e2380884b2d8d12944e3a3fc921e532208b1791

folly/executors/CPUThreadPoolExecutor.cpp

@@ -114,7 +114,7 @@ CPUThreadPoolExecutor::getTaskQueue() {
   return taskQueue_.get();
 }
 
-void CPUThreadPoolExecutor::threadRun(std::shared_ptr<Thread> thread) {
+void CPUThreadPoolExecutor::threadRun(ThreadPtr thread) {
   this->threadPoolHook_.registerThread();
 
   thread->startupBaton.post();