Move destructor and Start to implementation

src/core/lib/gprpp/thd.h

@@ -39,26 +39,9 @@ class Thread {
 
   Thread(const char* thd_name, void (*thd_body)(void* arg), void* arg,
          bool* success = nullptr);
-  ~Thread() {
-    if (!alive_) {
-      // This thread never existed, so nothing to do
-    } else {
-      GPR_ASSERT(joined_);
-    }
-    if (real_) {
-      gpr_mu_destroy(&mu_);
-      gpr_cv_destroy(&ready_);
-    }
-  }
+  ~Thread();
 
-  void Start() {
-    gpr_mu_lock(&mu_);
-    if (alive_) {
-      started_ = true;
-      gpr_cv_signal(&ready_);
-    }
-    gpr_mu_unlock(&mu_);
-  }
+  void Start();
   void Join();
 
   static void Init();

src/core/lib/gprpp/thd_posix.cc

@@ -141,6 +141,27 @@ Thread::Thread(const char* thd_name, void (*thd_body)(void* arg), void* arg,
   }
 }
 
+Thread::~Thread() {
+  if (!alive_) {
+    // This thread never existed, so nothing to do
+  } else {
+    GPR_ASSERT(joined_);
+  }
+  if (real_) {
+    gpr_mu_destroy(&mu_);
+    gpr_cv_destroy(&ready_);
+  }
+}
+
+void Thread::Start() {
+  gpr_mu_lock(&mu_);
+  if (alive_) {
+    started_ = true;
+    gpr_cv_signal(&ready_);
+  }
+  gpr_mu_unlock(&mu_);
+}
+
 void Thread::Join() {
   if (alive_) {
     pthread_join(pthread_t(id_), nullptr);

src/core/lib/gprpp/thd_windows.cc

@@ -112,6 +112,27 @@ Thread::Thread(const char* thd_name, void (*thd_body)(void* arg), void* arg,
   }
 }
 
+Thread::~Thread() {
+  if (!alive_) {
+    // This thread never existed, so nothing to do
+  } else {
+    GPR_ASSERT(joined_);
+  }
+  if (real_) {
+    gpr_mu_destroy(&mu_);
+    gpr_cv_destroy(&ready_);
+  }
+}
+
+void Thread::Start() {
+  gpr_mu_lock(&mu_);
+  if (alive_) {
+    started_ = true;
+    gpr_cv_signal(&ready_);
+  }
+  gpr_mu_unlock(&mu_);
+}
+
 void Thread::Join() {
   if (alive_) {
     thd_info* info = (thd_info*)id_;