Implement ScopedFD in terms of ScopedGeneric.

chrome/browser/process_singleton_mac_unittest.cc

Index: chrome/browser/process_singleton_mac_unittest.cc
diff --git a/chrome/browser/process_singleton_mac_unittest.cc b/chrome/browser/process_singleton_mac_unittest.cc
index 4246c27b2e27ccb3353073bf92bf77c1fedf8387..2a2d8d59670680c65057bbf3d78fa45e60101e1b 100644
--- a/chrome/browser/process_singleton_mac_unittest.cc
+++ b/chrome/browser/process_singleton_mac_unittest.cc
@@ -9,6 +9,7 @@
 #include "chrome/browser/process_singleton.h"
 
 #include "base/file_util.h"
+#include "base/files/scoped_file.h"
 #include "base/path_service.h"
 #include "base/posix/eintr_wrapper.h"
 #include "chrome/common/chrome_constants.h"
@@ -39,15 +40,13 @@ class ProcessSingletonMacTest : public PlatformTest {
   // Return |true| if the file exists and is locked.  Forces a failure
   // in the containing test in case of error condition.
   bool IsLocked() {
-    int fd = HANDLE_EINTR(open(lock_path_.value().c_str(), O_RDONLY));
-    if (fd == -1) {
+    base::ScopedFD fd(HANDLE_EINTR(open(lock_path_.value().c_str(), O_RDONLY)));
+    if (!fd) {
       EXPECT_EQ(ENOENT, errno) << "Unexpected error opening lockfile.";
       return false;
     }
 
-    file_util::ScopedFD auto_close(&fd);
-
-    int rc = HANDLE_EINTR(flock(fd, LOCK_EX|LOCK_NB));
+    int rc = HANDLE_EINTR(flock(fd.get(), LOCK_EX|LOCK_NB));
 
     // Got the lock, so it wasn't already locked.  Close releases.
     if (rc != -1)