Make nt_registry Create/OpenRegKey return a scoped object

chrome_elf/chrome_elf_security.cc

Index: chrome_elf/chrome_elf_security.cc
diff --git a/chrome_elf/chrome_elf_security.cc b/chrome_elf/chrome_elf_security.cc
index 2b3c8258ea2d53065639aef9f8f8315b4500b237..4e6f2a4864e904c595e21eef0703d24e9af81fef 100644
--- a/chrome_elf/chrome_elf_security.cc
+++ b/chrome_elf/chrome_elf_security.cc
@@ -19,13 +19,12 @@ void EarlyBrowserSecurity() {
   // This function is called from within DllMain.
   // Don't do anything naughty while we have the loader lock.
   NTSTATUS ret_val = STATUS_SUCCESS;
-  HANDLE handle = INVALID_HANDLE_VALUE;
 
   // Check for kRegistrySecurityFinchPath.  If it exists,
   // we do NOT disable extension points.  (Emergency off flag.)
   if (nt::OpenRegKey(nt::HKCU, elf_sec::kRegSecurityFinchPath, KEY_QUERY_VALUE,
-                     &handle, &ret_val)) {
-    nt::CloseRegKey(handle);
+                     &ret_val)
+          .is_valid()) {
     return;
   }
 #ifdef _DEBUG