Remove SetNonBlocking/SetBlocking methods from Socket and add missing close-on-exec

runtime/bin/socket_macos.cc

Index: runtime/bin/socket_macos.cc
diff --git a/runtime/bin/socket_macos.cc b/runtime/bin/socket_macos.cc
index ffe0aeed679c83b217f2fe0357a7a15aaffac602..da659ff7fe8ac3a607edab9286930cff3caad85c 100644
--- a/runtime/bin/socket_macos.cc
+++ b/runtime/bin/socket_macos.cc
@@ -86,7 +86,7 @@ intptr_t Socket::CreateConnect(RawAddr addr, const intptr_t port) {
     return fd;
   }
 
-  Socket::SetNonBlocking(fd);
+  FDUtils::SetNonBlocking(fd);
 
   return Socket::Connect(fd, addr, port);
 }
@@ -298,7 +298,7 @@ intptr_t Socket::CreateBindDatagram(
     return -1;
   }
 
-  Socket::SetNonBlocking(fd);
+  FDUtils::SetNonBlocking(fd);
   return fd;
 }
 
@@ -398,7 +398,7 @@ intptr_t ServerSocket::CreateBindListen(RawAddr addr,
     return -1;
   }
 
-  Socket::SetNonBlocking(fd);
+  FDUtils::SetNonBlocking(fd);
   return fd;
 }
 
@@ -423,7 +423,8 @@ intptr_t ServerSocket::Accept(intptr_t fd) {
       socket = kTemporaryFailure;
     }
   } else {
-    Socket::SetNonBlocking(socket);
+    FDUtils::SetCloseOnExec(socket);
+    FDUtils::SetNonBlocking(socket);
   }
   return socket;
 }
@@ -435,16 +436,6 @@ void Socket::Close(intptr_t fd) {
 }
 
 
-bool Socket::SetNonBlocking(intptr_t fd) {
-  return FDUtils::SetNonBlocking(fd);
-}
-
-
-bool Socket::SetBlocking(intptr_t fd) {
-  return FDUtils::SetBlocking(fd);
-}
-
-
 bool Socket::GetNoDelay(intptr_t fd, bool* enabled) {
   int on;
   socklen_t len = sizeof(on);