moved created() into header file

src/cpp/thread_manager/thread_manager.cc

@@ -52,10 +52,6 @@ void ThreadManager::WorkerThread::Run() {
 }
 
 
-inline bool ThreadManager::WorkerThread::created() const {
-  return created_;
-}
-
 ThreadManager::WorkerThread::~WorkerThread() {
   // Don't join until the thread is fully constructed.
   thd_.Join();

src/cpp/thread_manager/thread_manager.h

@@ -124,7 +124,7 @@ class ThreadManager {
     WorkerThread(ThreadManager* thd_mgr);
     ~WorkerThread();
 
-    bool created() const;
+    bool created() const { return created_; }
    private:
     // Calls thd_mgr_->MainWorkLoop() and once that completes, calls
     // thd_mgr_>MarkAsCompleted(this) to mark the thread as completed