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

runtime/bin/file_system_watcher_macos.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_MACOS)
 
 #include "bin/file_system_watcher.h"
 
 #include <errno.h>  // NOLINT
@@ skipping 246 matching lines @@
 
   bool has_run_loop() const { return run_loop_ != NULL; }
 
   static void TimerCallback(CFRunLoopTimerRef timer, void* context) {
     // Dummy callback to keep RunLoop alive.
   }
 
   Node* AddPath(const char* path, int events, bool recursive) {
     int fds[2];
     VOID_NO_RETRY_EXPECTED(pipe(fds));
-    Socket::SetNonBlocking(fds[0]);
-    Socket::SetBlocking(fds[1]);
+    FDUtils::SetNonBlocking(fds[0]);
+    FDUtils::SetBlocking(fds[1]);
 
     char base_path[PATH_MAX];
     realpath(path, base_path);
 
     return new Node(this, base_path, fds[0], fds[1], recursive);
   }
 
  private:
   static void Callback(ConstFSEventStreamRef ref,
                        void* client,
@@ skipping 107 matching lines @@
     Dart_ListSetAt(event, 4, Dart_NewInteger(path_id));
     Dart_ListSetAt(events, i, event);
   }
   return events;
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_MACOS)
-
-